H02H 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)
Introduced: September 1968
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.
Title
Titles differ between systems:
IPC: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
CPC: 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)
Full Title
Full titles differ between systems:
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
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)
IPC and CPC are identically structured here. All 8 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H02H 1/00 Details of emergency protective circuit arrangements +4 CPC IPC+CPC Available in IPC and CPC
- H02H 11/00 Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result +6 CPC IPC+CPC Available in IPC and CPC
- 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 ) +2 CPC IPC+CPC Available in IPC and CPC
- 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) +1 CPC IPC+CPC Available in IPC and CPC
- 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 since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- 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 +5 CPC IPC+CPC Available in IPC and CPC
- H02H 9/00 Emergency protective circuit arrangements for limiting excess current or voltage without disconnection +3 CPC IPC+CPC Available in IPC and CPC
- H02H 99/00 Subject matter not provided for in other groups of this subclass since 2009 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class H02,2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 54,496
- MITSUBISHI ELECTRIC CORPORATION JP 10,495
- TOYOTA MOTOR CORPORATION 9,464
- GUANGDONG POWER GRID CORPORATION 9,339
- ROBERT BOSCH DE 8,226
- SIEMENS DE 8,218
- DENSO CORPORATION 7,063
- MITSUBISHI ELECTRIC CORPORATION 6,619
- SAMSUNG ELECTRONICS COMPANY KR 5,826
- GREE ELECTRIC APPLIANCES 5,094
Top Applicants (CPC)
Class H02,2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 24,515
- MITSUBISHI ELECTRIC CORPORATION JP 11,346
- SIEMENS DE 9,026
- ROBERT BOSCH DE 9,005
- SAMSUNG ELECTRONICS COMPANY KR 6,729
- GUANGDONG POWER GRID CORPORATION 5,740
- DENSO CORPORATION JP 5,077
- LG ELECTRONICS KR 5,041
- LG INNOTEK COMPANY KR 4,442
- TOYOTA MOTOR CORPORATION 4,349