for dynamo-electric motors

Introduced: September 1968

Full Title

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 > for dynamo-electric motors

CPC subdivides this area 3x more granularly than IPC with 6 additional codes.

6 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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H02H 7/0805 CPC only CPC only
H02H 7/0811 CPC only CPC only
H02H 7/0816 CPC only CPC only
H02H 7/0822 CPC only CPC only
H02H 7/0827 CPC only CPC only
H02H 7/0833 +2 CPC CPC only CPC only
H02H 7/085 against excessive load +6 CPC IPC+CPC Available in IPC and CPC
H02H 7/09 against over-voltage; against reduction of voltage; against phase interruption IPC+CPC Available in IPC and CPC
H02H 7/093 against increase beyond, or decrease below, a predetermined level of rotational speed (centrifugal switches H01H35/10) IPC+CPC Available in IPC and CPC
H02H 7/097 against wrong direction of rotation IPC+CPC Available in IPC and CPC