responsive to undervoltage or no-voltage

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection > responsive to undervoltage or no-voltage

CPC:

Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection (specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H7/00; systems for change-over to standby supply H02J9/00 ) > responsive to undervoltage or no-voltage

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

IPC defines codes here since 1980.

Child Classifications

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H02H 3/243 CPC only CPC only
H02H 3/247 having timing means since 1980 IPC+CPC Available in IPC and CPC
H02H 3/253 for multiphase applications, e.g. phase interruption since 1980 IPC+CPC Available in IPC and CPC