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

Introduced: September 1968

Of 15 combined children, 10 exist in both systems.

5 codes are CPC-only extensions.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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H02H 7/001 CPC only CPC only
H02H 7/003 CPC only CPC only
H02H 7/005 CPC only CPC only
H02H 7/006 CPC only CPC only
H02H 7/008 CPC only CPC only
H02H 7/04 for transformers +1 CPC IPC+CPC Available in IPC and CPC
H02H 7/06 for dynamo-electric generators; for synchronous capacitors +3 CPC IPC+CPC Available in IPC and CPC
H02H 7/08 for dynamo-electric motors +6 CPC IPC+CPC Available in IPC and CPC
H02H 7/10 for converters; for rectifiers +2 CPC IPC+CPC Available in IPC and CPC
H02H 7/16 for capacitors (for synchronous capacitors H02H7/06) IPC+CPC Available in IPC and CPC
H02H 7/18 for batteries; for accumulators IPC+CPC Available in IPC and CPC
H02H 7/20 for electronic equipment (for converters H02H7/10; for electric measuring instruments G01R1/36; for DC voltage or current semiconductor regulators G05F1/569; for amplifiers H03F1/52; for electronic switching circuits H03K17/08) +1 CPC IPC+CPC Available in IPC and CPC
H02H 7/22 for distribution gear, e.g. bus-bar systems; for switching devices +3 CPC IPC+CPC Available in IPC and CPC
H02H 7/24 for spark-gap arresters IPC+CPC Available in IPC and CPC
H02H 7/26 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 (locating faults in cables G01R31/08) +5 CPC IPC+CPC Available in IPC and CPC