EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H)

Description

H02H covers circuit arrangements designed to protect electrical systems and equipment from hazardous fault conditions, including overcurrent, overvoltage, and thermal failures. This subclass encompasses protective devices such as circuit breakers, fuses, surge arresters, and automatic disconnection mechanisms that interrupt or limit power flow when abnormal operating conditions are detected. The classification includes both the protective devices themselves and the control circuits that trigger protective actions, as well as coordination schemes for selective protection in complex electrical networks. Related protection of specific equipment types (motors, transformers, generators) may be classified in their respective technology areas within H02.

8 direct subcodes

Child Classifications

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H02H 1/00 Details of emergency protective circuit arrangements
H02H 11/00 Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
H02H 3/00 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 )
H02H 5/00 Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection (using simulators of the apparatus being protected H02H6/00; specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H7/00)
H02H 6/00 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
H02H 7/00 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
H02H 9/00 Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
H02H 99/00 Subject matter not provided for in other groups of this subclass