CPC Subgroup
H02J 9/04 in which the distribution system is disconnected from the normal source and connected to a standby source
Full Title
Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting > in which the distribution system is disconnected from the normal source and connected to a standby source
1 direct subcode
Child Classifications
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- H02J 9/06 with automatic change-over