POWER SUPPLY CIRCUIT BREAKER

摘要

PROBLEM TO BE SOLVED: To provide a power supply circuit breaker capable of securing a sufficient time lag when switching a signal circuit switch and a main circuit switch to OFF states during an operation for breaking a power supply circuit.SOLUTION: A service plug 1 includes: a pair of main terminals 13 and 23; a pair of signal terminals 15 and 27; a lock part 35 for locking a lever 30 to a second connector housing 20 to regulate the rotation of the lever 30 in the state where the lever 30 is located at a signal circuit breaking position between a complete fitting position and a non-fitting position; and an unlock part 36 for cancelling a locked state of the lock part 35. The unlock part 36 is provided so as to be non-operable from the complete fitting position to the signal circuit breaking position and to be operable at the signal circuit breaking position. In the state where the lever 30 is located at the signal circuit breaking position, the pair of main terminals 13 and 23 are in a connected state and the pair of signal terminals 15 and 27 are in a disconnected state.