EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS

Introduced: September 1968

Classification Context

Section:: ELECTRICITY
Class:: GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
Subclass:: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS

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.

Related Keywords

CIRCUITS for emergency protectionDISCONNECTION of electric apparatus in emergencycircuit arrangements protecting electric devices against EMERGENCIESelectric protective circuits for EMERGENCIESreconnection of electric apparatus after EMERGENCIESprotective circuits responsive to electric FAULTScircuits for protecting electric lines or apparatus against LIGHTNINGcircuits in general for protecting against OVERLOADcircuits for PROTECTION of living beings against electricityelectric circuits for PROTECTION against abnormal working conditionsRECONNECTION of electric apparatus after emergencypreventing response of protective circuits to electric TRANSIENTS

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
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
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

Top Applicants

Top 10 applicants by patent filingsfor 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