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242 lines
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242 lines
137 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="H02H" definition-exists="true" date-revised="2018-08-01" status="published"><classification-symbol>H02H</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS </text><reference><text>indicating or signalling undesired working conditions <class-ref scheme="cpc">G01R</class-ref>, e.g. <class-ref scheme="cpc">G01R31/00</class-ref>, <class-ref scheme="cpc">G08B</class-ref>; locating faults along lines <class-ref scheme="cpc">G01R31/08</class-ref>; emergency protective devices <class-ref scheme="cpc">H01H</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This subclass <u>covers</u> only circuit arrangements for the automatic protection of electric lines or electric machines or apparatus in the event of an undesired change from normal working conditions</note-paragraph></note><note type="warning"><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H02H1/00" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02H1/00" definition-exists="true" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of emergency protective circuit arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H1/0007" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>concerning the detecting means </text><reference><text>in general <class-ref scheme="cpc">G01R</class-ref> or other subclasses of <class-ref scheme="cpc">G01</class-ref>; reed switches <class-ref scheme="cpc">H01H71/2445</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/0015" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Using arc detectors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H1/0023" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>sensing non electrical parameters, e.g. by optical, pneumatic, thermal or sonic sensors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/003" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fault detection by injection of an auxiliary voltage </text><reference><text>same for detection of earth fault currents <class-ref scheme="cpc">H02H3/17</class-ref>; for monitoring earth connection <class-ref scheme="cpc">H02H5/105</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H1/0038" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>concerning the connection of the detecting means, e.g. for reducing their number</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/0046" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Commutating the detecting means in dependance of the fault, e.g. for reducing their number</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/0053" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for storing the measured quantities during a predetermined time</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H1/0061" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>concerning transmission of signals </text><reference><text>transmission of measured quantities or switching orders; sectionalised protection involving signal transmission between at least two stations <class-ref scheme="cpc">H02H7/261</class-ref>; comparison of the voltage or current values at two spaced portions of a single system <class-ref scheme="cpc">H02H3/28</class-ref>; transferring the output of a sensing member to another variable <class-ref scheme="cpc">G01D5/00</class-ref>; electrical measuring arrangements using modulation of electromagnetic waves, e.g. light beams <class-ref scheme="cpc">G01R15/24</class-ref>, <class-ref scheme="cpc">G01R15/26</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/0069" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of light or heat rays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/0076" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by superposition on the watched current</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/0084" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of pilot wires or a telephone network; watching of these wires</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H1/0092" definition-exists="false" ipc-concordant="H02H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>concerning the data processing means, e.g. expert systems, neural networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H1/04" definition-exists="false" ipc-concordant="H02H1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for preventing response to transient abnormal conditions, e.g. to lightning </text><CPC-specific-text><text>or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/043" definition-exists="false" ipc-concordant="H02H1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to inrush currents </text><reference><text><class-ref scheme="cpc">H02H1/046</class-ref> takes precedence; differential protection of transformers <class-ref scheme="cpc">H02H7/045</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/046" definition-exists="false" ipc-concordant="H02H1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>upon detecting saturation of current transformers </text><reference><text>for differential protection <class-ref scheme="cpc">H02H3/283</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H1/06" definition-exists="true" ipc-concordant="H02H1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for supplying operative power </text><CPC-specific-text><reference><text>power supply arrangements in general <class-ref scheme="cpc">G05F</class-ref>, <class-ref scheme="cpc">H02M</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H1/063" definition-exists="false" ipc-concordant="H02H1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>primary power being supplied by fault current</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H1/066" definition-exists="false" ipc-concordant="H02H1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H1/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and comprising a shunt regulator</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02H3/00" definition-exists="true" ipc-concordant="H02H3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H02H3/00</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection </text><reference><text>specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems <class-ref scheme="cpc">H02H7/00</class-ref>; systems for change-over to standby supply <class-ref scheme="cpc">H02J9/00</class-ref> </text></reference><CPC-specific-text><text>; integrated protection </text><reference><text>for motors <class-ref scheme="cpc">H02H7/0822</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/003" definition-exists="false" ipc-concordant="H02H3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to reversal of power transmission direction </text><reference><text>reversal of direct current <class-ref scheme="cpc">H02H3/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/006" definition-exists="false" ipc-concordant="H02H3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Calibration or setting of parameters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/02" definition-exists="false" ipc-concordant="H02H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/021" definition-exists="false" ipc-concordant="H02H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order </text><reference><text>disconnection at zero value in general <class-ref scheme="cpc">H03K17/18</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/023" definition-exists="false" ipc-concordant="H02H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by short-circuiting</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/025" definition-exists="false" ipc-concordant="H02H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/027" definition-exists="true" ipc-concordant="H02H3/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H02H3/027</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with automatic disconnection after a predetermined time </text><reference><text><class-ref scheme="cpc">H02H3/033</class-ref>, <class-ref scheme="cpc">H02H3/06</class-ref> take precedence </text><CPC-specific-text><text>; timing in overcurrent protection circuits <class-ref scheme="cpc">H02H3/093</class-ref>; in undervoltage protection circuits <class-ref scheme="cpc">H02H3/247</class-ref>; staggered disconnection <class-ref scheme="cpc">H02H7/30</class-ref></text></CPC-specific-text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/033" definition-exists="false" ipc-concordant="H02H3/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with several disconnections in a preferential order, </text><CPC-specific-text><text>e.g. following priority of the users, load repartition</text></CPC-specific-text><reference><text><class-ref scheme="cpc">H02H3/06</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/04" definition-exists="true" ipc-concordant="H02H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned </text><CPC-specific-text><reference><text>watching of pilot wires <class-ref scheme="cpc">H02H1/0084</class-ref>; protection of protective arrangements <class-ref scheme="cpc">H02H7/008</class-ref>; indication of the state of electronic switches <class-ref scheme="cpc">H03K17/18</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/042" definition-exists="false" ipc-concordant="H02H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combined with means for locating the fault </text><reference><text>locating faults in cables <class-ref scheme="cpc">G01R31/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/044" definition-exists="false" ipc-concordant="H02H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Checking correct functioning of protective arrangements, e.g. by simulating a fault </text><reference><text>for differential current circuit breakers <class-ref scheme="cpc">H02H3/335</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/046" definition-exists="false" ipc-concordant="H02H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H02H3/046</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Signalling the blowing of a fuse </text><reference><text>detecting non functioning of a lamp <class-ref scheme="cpc">H05B47/20</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/048" definition-exists="false" ipc-concordant="H02H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Checking overvoltage diverters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/05" definition-exists="true" ipc-concordant="H02H3/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for increasing reliability, e.g. redundancy arrangements </text><CPC-specific-text><reference><text>for logic circuits <class-ref scheme="cpc">H03K19/003</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/06" definition-exists="false" ipc-concordant="H02H3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with automatic reconnection</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/063" definition-exists="false" ipc-concordant="H02H3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details concerning the co-operation of many similar arrangements, e.g. in a network </text><reference><text>sectionalised protection <class-ref scheme="cpc">H02H7/26</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/066" definition-exists="false" ipc-concordant="H02H3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reconnection being a consequence of eliminating the fault which caused disconnection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/07" definition-exists="false" ipc-concordant="H02H3/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>and with permanent disconnection after a predetermined number of reconnection cycles</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/08" definition-exists="true" ipc-concordant="H02H3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to excess current </text><reference><text>responsive to abnormal temperature caused by excess current <class-ref scheme="cpc">H02H5/04</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/081" definition-exists="false" ipc-concordant="H02H3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and depending on the direction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/083" definition-exists="false" ipc-concordant="H02H3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for three-phase systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/085" definition-exists="false" ipc-concordant="H02H3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>making use of a thermal sensor, e.g. thermistor, heated by the excess current </text><reference><text>also responsive to the temperature of the protected device <class-ref scheme="cpc">H02H5/041</class-ref>, thermal images <class-ref scheme="cpc">H02H6/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/087" definition-exists="false" ipc-concordant="H02H3/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for dc applications</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/093" definition-exists="true" ipc-concordant="H02H3/093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/093</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with timing means </text><CPC-specific-text><reference><text>in general <class-ref scheme="cpc">H02H3/027</class-ref>; thermal delay <class-ref scheme="cpc">H02H3/085</class-ref>; timing means for undervoltage protection <class-ref scheme="cpc">H02H3/247</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/0935" definition-exists="false" ipc-concordant="H02H3/093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/0935</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the timing being determined by numerical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/10" definition-exists="false" ipc-concordant="H02H3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>additionally responsive to some other abnormal electrical conditions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/105" definition-exists="false" ipc-concordant="H02H3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to excess current and fault current to earth</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/12" definition-exists="true" ipc-concordant="H02H3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to underload or no-load </text><CPC-specific-text><reference><text>for motors <class-ref scheme="cpc">H02H7/0827</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/13" definition-exists="false" ipc-concordant="H02H3/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for multiphase applications, e.g. phase interruption</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/14" definition-exists="true" ipc-concordant="H02H3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to occurrence of voltage on parts normally at earth potential </text><CPC-specific-text><reference><text>monitoring earth connection <class-ref scheme="cpc">H02H5/105</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/16" definition-exists="true" ipc-concordant="H02H3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H02H3/16</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>responsive to fault current to earth, frame or mass </text><reference><text>with balanced or differential arrangement <class-ref scheme="cpc">H02H3/26</class-ref> </text><CPC-specific-text><text>; monitoring earth connection <class-ref scheme="cpc">H02H5/105</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/162" definition-exists="false" ipc-concordant="H02H3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for ac systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/165" definition-exists="false" ipc-concordant="H02H3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for three-phase systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/167" definition-exists="false" ipc-concordant="H02H3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combined with other earth-fault protective arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/17" definition-exists="true" ipc-concordant="H02H3/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of an auxiliary voltage injected into the installation to be protected </text><CPC-specific-text><reference><text>using summation current transformers <class-ref scheme="cpc">H02H3/33</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/18" definition-exists="false" ipc-concordant="H02H3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to reversal of direct current</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/20" definition-exists="false" ipc-concordant="H02H3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to excess voltage</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/202" definition-exists="false" ipc-concordant="H02H3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for dc systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/205" definition-exists="false" ipc-concordant="H02H3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a spark-gap as detector</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/207" definition-exists="false" ipc-concordant="H02H3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>also responsive to under-voltage </text><reference><text>window comparators for indication <class-ref scheme="cpc">G01R19/165</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/22" definition-exists="false" ipc-concordant="H02H3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of short duration, e.g. lightning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/24" definition-exists="true" ipc-concordant="H02H3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to undervoltage or no-voltage </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H02H3/207</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/243" definition-exists="false" ipc-concordant="H02H3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for DC systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/247" definition-exists="false" ipc-concordant="H02H3/247" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having timing means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/253" definition-exists="false" ipc-concordant="H02H3/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/253</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for multiphase applications, e.g. phase interruption</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/26" definition-exists="false" ipc-concordant="H02H3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to difference between voltages or between currents</text></title-part><title-part><text>responsive to phase angle between voltages or between currents</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/265" definition-exists="false" ipc-concordant="H02H3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to phase angle between voltages or between currents</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/28" definition-exists="true" ipc-concordant="H02H3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus </text><CPC-specific-text><reference><text>for transformers <class-ref scheme="cpc">H02H7/045</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/283" definition-exists="false" ipc-concordant="H02H3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and taking into account saturation of current transformers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/286" definition-exists="false" ipc-concordant="H02H3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving comparison of similar homopolar quantities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/30" definition-exists="false" ipc-concordant="H02H3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using pilot wires or other signalling channel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/302" definition-exists="false" ipc-concordant="H02H3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving phase comparison</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/305" definition-exists="false" ipc-concordant="H02H3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving current comparison</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/307" definition-exists="false" ipc-concordant="H02H3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving comparison of quantities derived from a plurality of phases, e.g. homopolar quantities; using mixing transformers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/32" definition-exists="false" ipc-concordant="H02H3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/325" definition-exists="false" ipc-concordant="H02H3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving voltage comparison </text><reference><text><class-ref scheme="cpc">H02H3/347</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/33" definition-exists="true" ipc-concordant="H02H3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/33</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using summation current transformers </text><reference><text><class-ref scheme="cpc">H02H3/347</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/331" definition-exists="false" ipc-concordant="H02H3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/331</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to earthing of the neutral conductor </text><reference><text><class-ref scheme="cpc">H02H3/338</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/332" definition-exists="false" ipc-concordant="H02H3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/332</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means responsive to dc component in the fault current</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/334" definition-exists="false" ipc-concordant="H02H3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/334</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means to produce an artificial unbalance for other protection or monitoring reasons or remote control </text><reference><text><class-ref scheme="cpc">H02H3/338</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H02H3/335" definition-exists="false" ipc-concordant="H02H3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/335</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the main function being self testing of the device</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/337" definition-exists="false" ipc-concordant="H02H3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/337</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>avoiding disconnection due to reactive fault currents</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/338" definition-exists="false" ipc-concordant="H02H3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/338</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>also responsive to wiring error, e.g. loss of neutral, break</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/34" definition-exists="false" ipc-concordant="H02H3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of a three-phase system</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/343" definition-exists="false" ipc-concordant="H02H3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/343</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using phase sequence analysers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/347" definition-exists="false" ipc-concordant="H02H3/347" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/347</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using summation current transformers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H3/353" definition-exists="false" ipc-concordant="H02H3/353" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/353</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving comparison of phase voltages</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/36" definition-exists="false" ipc-concordant="H02H3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving comparison of the voltage or current values at corresponding points of different systems, e.g. of parallel feeder systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H3/365" definition-exists="false" ipc-concordant="H02H3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>one of the systems simulating the other system</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/38" definition-exists="false" ipc-concordant="H02H3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to both voltage and current</text></title-part><title-part><text>responsive to phase angle between voltage and current</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/382" definition-exists="false" ipc-concordant="H02H3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/382</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving phase comparison between current and voltage or between values derived from current and voltage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/385" definition-exists="false" ipc-concordant="H02H3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using at least one homopolar quantity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/387" definition-exists="false" ipc-concordant="H02H3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/387</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using phase-sequence analysing arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/40" definition-exists="false" ipc-concordant="H02H3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to ratio of voltage and current</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/402" definition-exists="false" ipc-concordant="H02H3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/402</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using homopolar quantities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/405" definition-exists="false" ipc-concordant="H02H3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using phase sequence analysing arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/407" definition-exists="false" ipc-concordant="H02H3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using induction relays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/42" definition-exists="false" ipc-concordant="H02H3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to product of voltage and current</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/422" definition-exists="false" ipc-concordant="H02H3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using homopolar quantities</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/425" definition-exists="false" ipc-concordant="H02H3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using phase sequence analysing arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/427" definition-exists="false" ipc-concordant="H02H3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using induction relays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/44" definition-exists="false" ipc-concordant="H02H3/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to the rate of change of electrical quantities</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/445" definition-exists="false" ipc-concordant="H02H3/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of DC quantities</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/46" definition-exists="false" ipc-concordant="H02H3/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to frequency deviations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/48" definition-exists="false" ipc-concordant="H02H3/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to loss of synchronism</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H3/50" definition-exists="false" ipc-concordant="H02H3/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to the appearance of abnormal wave forms, e.g. ac in dc installations</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H3/52" definition-exists="false" ipc-concordant="H02H3/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H3/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to the appearance of harmonics</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02H5/00" definition-exists="true" ipc-concordant="H02H5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection </text><reference><text>using simulators of the apparatus being protected <class-ref scheme="cpc">H02H6/00</class-ref>; specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems <class-ref scheme="cpc">H02H7/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H5/005" definition-exists="false" ipc-concordant="H02H5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to ionising radiation; Nuclear-radiation circumvention circuits </text><reference><text>radiation detectors <class-ref scheme="cpc">G01T</class-ref>; nuclear-explosion detection <class-ref scheme="cpc">G21J5/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H5/04" definition-exists="true" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to abnormal temperature </text><CPC-specific-text><reference><text>specially adapted for electric machines <class-ref scheme="cpc">H02H7/0852</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/041" definition-exists="false" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>additionally responsive to excess current </text><reference><text><class-ref scheme="cpc">H02H5/048</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/042" definition-exists="false" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using temperature dependent resistors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H5/043" definition-exists="false" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the temperature dependent resistor being disposed parallel to a heating wire, e.g. in a heating blanket</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/044" definition-exists="false" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a semiconductor device to sense the temperature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/045" definition-exists="false" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a thermal radiation sensor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/046" definition-exists="false" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a thermocouple</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/047" definition-exists="false" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a temperature responsive switch</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H5/048" definition-exists="false" ipc-concordant="H02H5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>additionally responsive to excess current due to heating of the switch</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/06" definition-exists="false" ipc-concordant="H02H5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in oil-filled electric apparatus</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H5/08" definition-exists="false" ipc-concordant="H02H5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/083" definition-exists="false" ipc-concordant="H02H5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to the entry or leakage of a liquid into an electrical appliance </text><reference><text>moisture alarm <class-ref scheme="cpc">G08B21/20</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/086" definition-exists="false" ipc-concordant="H02H5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of cooling or lubricating fluids</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H5/10" definition-exists="false" ipc-concordant="H02H5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to mechanical injury, e.g. rupture of line, breakage of earth connection</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H5/105" definition-exists="false" ipc-concordant="H02H5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to deterioration or interruption of earth connection </text><reference><text>for preventing switching-on <class-ref scheme="cpc">H02H11/001</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H5/12" definition-exists="false" ipc-concordant="H02H5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to undesired approach to, or touching of, live parts by living beings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02H6/00" definition-exists="true" ipc-concordant="H02H6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H6/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H6/005" definition-exists="false" ipc-concordant="H02H6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H6/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital thermal images</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02H7/00" definition-exists="true" ipc-concordant="H02H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions </text><reference><text>structural association of protective devices with specific machines or apparatus and their protection without automatic disconnection, <u>see</u> the relevant subclass for the machine or apparatus</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/001" definition-exists="false" ipc-concordant="H02H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H02H7/001</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>for superconducting apparatus, e.g. coils, lines, machines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/003" definition-exists="false" ipc-concordant="H02H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for electrostatic apparatus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/005" definition-exists="false" ipc-concordant="H02H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for remote controlled apparatus; for lines connecting such apparatus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/006" definition-exists="false" ipc-concordant="H02H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for non-insulated low-voltage distribution systems, e.g. low-voltage halogen-lamp system</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/008" definition-exists="false" ipc-concordant="H02H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for protective arrangements according to this subclass </text><reference><text><class-ref scheme="cpc">H02H9/042</class-ref>, <class-ref scheme="cpc">H02H9/043</class-ref> take precedence; protection of spark-gaps <class-ref scheme="cpc">H02H7/24</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/04" definition-exists="false" ipc-concordant="H02H7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for transformers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/042" definition-exists="false" ipc-concordant="H02H7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for current transformers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/045" definition-exists="false" ipc-concordant="H02H7/045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Differential protection of transformers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0455" definition-exists="false" ipc-concordant="H02H7/045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>taking into account saturation of current transformers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/05" definition-exists="false" ipc-concordant="H02H7/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for capacitive voltage transformers, e.g. against resonant conditions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/055" definition-exists="false" ipc-concordant="H02H7/055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/055</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for tapped transformers or tap-changing means thereof</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/06" definition-exists="false" ipc-concordant="H02H7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for dynamo-electric generators</text></title-part><title-part><text>for synchronous capacitors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/062" definition-exists="false" ipc-concordant="H02H7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for parallel connected generators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/065" definition-exists="false" ipc-concordant="H02H7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>against excitation faults</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/067" definition-exists="false" ipc-concordant="H02H7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H02H7/067</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>on occurrence of a load dump </text><reference><text>control on sudden change of load <class-ref scheme="cpc">H02P9/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/08" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for dynamo-electric motors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/0805" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for synchronous motors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/0811" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0811</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for dc motors </text><reference><text><class-ref scheme="cpc">H02H7/0833</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/0816" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>concerning the starting sequence, e.g. limiting the number of starts per time unit, monitoring speed during starting</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/0822" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integrated protection, motor control centres</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/0827" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to underload or no-load, e.g. pump-off control circuits for pump motors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/0833" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for electric motors with control arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0838" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0838</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with H-bridge circuit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0844" definition-exists="false" ipc-concordant="H02H7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0844</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/085" definition-exists="true" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>against excessive load </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H02H6/00</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0851" definition-exists="true" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0851</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0852" definition-exists="false" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0852</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>directly responsive to abnormal temperature by using a temperature sensor </text><reference><text>in a control circuit <class-ref scheme="cpc">H02H7/0833</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0853" definition-exists="false" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0853</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for motors rotating in both directions </text><reference><text><class-ref scheme="cpc">H02H7/0851</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0854" definition-exists="false" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0854</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to rate of change of current, couple or speed, e.g. anti-kickback protection </text><reference><text><class-ref scheme="cpc">H02H7/0851</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0855" definition-exists="false" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0855</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>avoiding response to transient overloads, e.g. during starting</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/0856" definition-exists="true" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0856</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the protection measure taken</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/0857" definition-exists="false" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0857</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by lowering the mechanical load of the motor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/0858" definition-exists="false" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by reversing, cycling or reducing the power supply to the motor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/0859" definition-exists="false" ipc-concordant="H02H7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/0859</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>avoiding restarting after fault condition has disappeared</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/09" definition-exists="false" ipc-concordant="H02H7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>against over-voltage</text></title-part><title-part><text>against reduction of voltage</text></title-part><title-part><text>against phase interruption</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/093" definition-exists="true" ipc-concordant="H02H7/093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/093</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>against increase beyond, or decrease below, a predetermined level of rotational speed </text><reference><text>centrifugal switches <class-ref scheme="cpc">H01H35/10</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/097" definition-exists="false" ipc-concordant="H02H7/097" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/097</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>against wrong direction of rotation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/10" definition-exists="true" ipc-concordant="H02H7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for converters</text></title-part><title-part><text>for rectifiers </text><CPC-specific-text><reference><text>forming part of the control circuit of the converter, <u>see</u> the relevant group in <class-ref scheme="cpc">H02M</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/103" definition-exists="false" ipc-concordant="H02H7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for rotating converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/106" definition-exists="false" ipc-concordant="H02H7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for dynamic converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/12" definition-exists="true" ipc-concordant="H02H7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for static converters or rectifiers </text><CPC-specific-text><reference><text>for discharge lamp power supplies using static converters <class-ref scheme="cpc">H05B41/2851</class-ref>, <class-ref scheme="cpc">H05B41/2921</class-ref>, <class-ref scheme="cpc">H05B41/2981</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/1203" definition-exists="false" ipc-concordant="H02H7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits independent of the type of conversion</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/1206" definition-exists="false" ipc-concordant="H02H7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted to conversion cells composed of a plurality of parallel or serial connected elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/1209" definition-exists="false" ipc-concordant="H02H7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for converters using only discharge tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/1213" definition-exists="false" ipc-concordant="H02H7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1213</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for DC-DC converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/1216" definition-exists="false" ipc-concordant="H02H7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for AC-AC converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/122" definition-exists="false" ipc-concordant="H02H7/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for inverters, i.e. dc/ac converters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/1222" definition-exists="false" ipc-concordant="H02H7/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to abnormalities in the input circuit, e.g. transients in the DC input</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/1225" definition-exists="false" ipc-concordant="H02H7/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to internal faults, e.g. shoot-through </text><reference><text>avoiding shoot-through <class-ref scheme="cpc">H02M1/38</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/1227" definition-exists="false" ipc-concordant="H02H7/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to abnormalities in the output circuit, e.g. short circuit</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/125" definition-exists="false" ipc-concordant="H02H7/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for rectifiers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/1252" definition-exists="false" ipc-concordant="H02H7/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to overvoltage in input or output, e.g. by load dump</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/1255" definition-exists="false" ipc-concordant="H02H7/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to internal faults, e.g. by monitoring ripple in output voltage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/1257" definition-exists="false" ipc-concordant="H02H7/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/1257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to short circuit or wrong polarity in output circuit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H02H7/127" definition-exists="false" ipc-concordant="H02H7/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having auxiliary control electrode to which blocking control voltages or currents are applied in case of emergency</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/16" definition-exists="true" ipc-concordant="H02H7/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for capacitors </text><reference><text>for synchronous capacitors <class-ref scheme="cpc">H02H7/06</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/18" definition-exists="false" ipc-concordant="H02H7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for batteries</text></title-part><title-part><text>for accumulators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/20" definition-exists="true" ipc-concordant="H02H7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for electronic equipment </text><reference><text>for converters <class-ref scheme="cpc">H02H7/10</class-ref>; for electric measuring instruments <class-ref scheme="cpc">G01R1/36</class-ref>; for dc voltage or current semiconductor regulators <class-ref scheme="cpc">G05F1/569</class-ref>; for amplifiers <class-ref scheme="cpc">H03F1/52</class-ref>; for electronic switching circuits <class-ref scheme="cpc">H03K17/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/205" definition-exists="false" ipc-concordant="H02H7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for controlled semi-conductors which are not included in a specific circuit arrangement</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/22" definition-exists="true" ipc-concordant="H02H7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for distribution gear, e.g. bus-bar systems</text></title-part><title-part><text>for switching devices </text><CPC-specific-text><reference><text>detecting mechanical or electrical defects in gas-insulated switchgears <class-ref scheme="cpc">H02B13/065</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/222" definition-exists="false" ipc-concordant="H02H7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for switches</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/224" definition-exists="false" ipc-concordant="H02H7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anti-pump circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/226" definition-exists="false" ipc-concordant="H02H7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for wires or cables, e.g. heating wires</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/228" definition-exists="false" ipc-concordant="H02H7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for covered wires or cables</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/24" definition-exists="false" ipc-concordant="H02H7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for spark-gap arresters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H7/26" definition-exists="true" ipc-concordant="H02H7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured </text><reference><text>locating faults in cables <class-ref scheme="cpc">G01R31/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/261" definition-exists="false" ipc-concordant="H02H7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving signal transmission between at least two stations </text><reference><text>transmission of signals in general <class-ref scheme="cpc">H02H1/0061</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/262" definition-exists="false" ipc-concordant="H02H7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving transmissions of switching or blocking orders</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H7/263" definition-exists="false" ipc-concordant="H02H7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving transmissions of measured values </text><reference><text>comparison of currents or voltages using pilot wires <class-ref scheme="cpc">H02H3/30</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/265" definition-exists="false" ipc-concordant="H02H7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>making use of travelling wave theory</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/266" definition-exists="false" ipc-concordant="H02H7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving switching on a spare supply </text><reference><text>in general <class-ref scheme="cpc">H02J9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/267" definition-exists="false" ipc-concordant="H02H7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for parallel lines and wires</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/268" definition-exists="false" ipc-concordant="H02H7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for dc systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/28" definition-exists="false" ipc-concordant="H02H7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H7/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for meshed systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H7/30" definition-exists="true" ipc-concordant="H02H7/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H02H7/30</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Staggered disconnection</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02H9/00" definition-exists="true" ipc-concordant="H02H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emergency protective circuit arrangements for limiting excess current or voltage without disconnection </text><reference><text>structural association of protective devices with specific machines or apparatus, <u>see</u> the relevant subclass for the machine or apparatus</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H9/001" definition-exists="false" ipc-concordant="H02H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>limiting speed of change of electric quantities, e.g. soft switching on or off </text><reference><text>progressive control of electronic switches for eliminating interferences <class-ref scheme="cpc">H03K17/16</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/002" definition-exists="false" ipc-concordant="H02H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>limiting inrush current on switching on of inductive loads subjected to remanence, e.g. transformers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/004" definition-exists="false" ipc-concordant="H02H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in connection with live-insertion of plug-in units </text><reference><text>involving communication with a central processing unit <class-ref scheme="cpc">G06F13/40</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H9/005" definition-exists="false" ipc-concordant="H02H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>avoiding undesired transient conditions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/007" definition-exists="false" ipc-concordant="H02H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>avoiding or damping oscillations, e.g. fenoresonance or travelling waves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H9/008" definition-exists="false" ipc-concordant="H02H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intrinsically safe circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H9/02" definition-exists="true" ipc-concordant="H02H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to excess current </text><CPC-specific-text><reference><text>current limitation for voltage regulators <class-ref scheme="cpc">G05F1/573</class-ref>; disconnection after limiting <class-ref scheme="cpc">H02H3/025</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/021" definition-exists="false" ipc-concordant="H02H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current limitation using saturable reactors </text><reference><text><class-ref scheme="cpc">H02H9/023</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/023" definition-exists="false" ipc-concordant="H02H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H02H9/023</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>Current limitation using superconducting elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/025" definition-exists="false" ipc-concordant="H02H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current limitation using field effect transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/026" definition-exists="false" ipc-concordant="H02H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/028" definition-exists="false" ipc-concordant="H02H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current limitation by detuning a series resonant circuit </text><reference><text><class-ref scheme="cpc">H02H9/021</class-ref>, <class-ref scheme="cpc">H02H9/023</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H9/04" definition-exists="true" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to excess voltage </text><reference><text>lightning arrestors <class-ref scheme="cpc">H01C7/12</class-ref>, <class-ref scheme="cpc">H01C8/04</class-ref>, <class-ref scheme="cpc">H01G9/18</class-ref>, <class-ref scheme="cpc">H01T</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/041" definition-exists="true" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a short-circuiting device</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/042" definition-exists="false" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising means to limit the absorbed power or indicate damaged over-voltage protection device</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/043" definition-exists="false" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection of over-voltage protection device by short-circuiting</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/044" definition-exists="false" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-02-01" status="published"><classification-symbol>H02H9/044</classification-symbol><class-title date-revised="2023-02-01"><title-part><CPC-specific-text><text>Physical layout, materials not provided for elsewhere </text><reference><text>varistors <class-ref scheme="cpc">H01C7/12</class-ref>; spark-gaps <class-ref scheme="cpc">H01T</class-ref>; Ovshinsky devices <class-ref scheme="cpc">H10N70/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/045" definition-exists="false" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted to a particular application and not provided for elsewhere</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H9/046" definition-exists="true" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>responsive to excess voltage appearing at terminals of integrated circuits </text><reference><text>protection by specific structural integration design <class-ref scheme="cpc">H01L27/0248</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H02H9/047" definition-exists="false" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Free-wheeling circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/048" definition-exists="false" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anti-latching or quenching devices, i.e. bringing the protection device back to its normal state after a protection action</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/049" definition-exists="false" ipc-concordant="H02H9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/049</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuit arrangements for limiting the number of protection devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H9/06" definition-exists="false" ipc-concordant="H02H9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using spark-gap arresters</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H9/08" definition-exists="false" ipc-concordant="H02H9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H02H9/08</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Limitation or suppression of earth fault currents, e.g. Petersen coil</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02H11/00" definition-exists="true" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H11/001" definition-exists="false" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in case of incorrect or interrupted earth connection </text><reference><text>disconnection by breaking of earth connection <class-ref scheme="cpc">H02H5/105</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H11/002" definition-exists="false" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in case of inverted polarity or connection; with switching for obtaining correct connection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H11/003" definition-exists="false" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a field effect transistor as protecting element in one of the supply lines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H11/004" definition-exists="false" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in case of incorrect phase sequence; with switching for obtaining correct phase sequence </text><reference><text>protection of motors against wrong direction of rotation <class-ref scheme="cpc">H02H7/097</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H11/005" definition-exists="false" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in case of too low isolation resistance, too high load, short-circuit; earth fault</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H11/006" definition-exists="false" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in case of too high or too low voltage</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H02H11/007" definition-exists="false" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving automatic switching for adapting the protected apparatus to the supply voltage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H02H11/008" definition-exists="false" ipc-concordant="H02H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H02H11/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>preventing unsafe switching operations in substations (Schaltfehlerschutz)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H02H99/00" definition-exists="false" ipc-concordant="H02H99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H02H99/00</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Subject matter not provided for in other groups of this subclass</text></title-part></class-title></classification-item></classification-item></classification-item></class-scheme> |