FIELD: electricity.
SUBSTANCE: automatic circuit breaker comprises a guide and a locking device which accommodates a button hold piece which holds and releases a shutoff button, a working unit, a switch lock button comprising an indicator turnable in a fitting in/out section, and a switch hold element. A fitting in/out device of the guide enables to insert into a fitting in/out handle axis of the automatic circuit breaker only when the circuit breaker is disconnected.
EFFECT: ensured miniaturisation of a main body by the installation of the locking device on the guide and guaranteed user's safety and line and device protection in a power supply system.
10 cl, 11 dwg
