MODULAR DIFFERENTIAL CIRCUIT BREAKER Russian patent published in 2000 - IPC

FIELD: electrical engineering. SUBSTANCE: modular differential circuit breaker has multiple-pole circuit breaker chosen out of those distinguished by pole number and differential protective unit also chosen out of those distinguished by pole number. Any of mentioned multiple-pole circuit breakers is designed for parallel connection to differential protective unit. Control panel mounts secondary error correction elements interacting with primary ones installed on connecting side surface of multiple-pole circuit breaker so that the latter can be connected to differential protective unit only when their pole number is the same. So, in wiring the module, circuit breaker cannot be connected to differential protective gear unless their pole number is the same thereby preventing failure of circuit breaker. EFFECT: improved reliability of wiring modular differential circuit breaker. 4 cl, 12 dwg