Electronic circuit for an electronic interruptorcircuito of detecao of detecao and shooting for a circuit interrupter circuit.

摘要

A circuit breaker having an improved tripping system including a current transformer of the non-saturating type for coupling current in a line to be protected through a bridge network to an electrical circuit. The electrical circuit performs the dual functions of monitoring the output signal from the bridge circuit to determine if a time delayed tripping action should be performed and of providing energy to the trip coil of the circuit breaker for causing actuation thereof at the appropriate time. The previously mentioned dual function circuit has the characteristics of only monitoring the signal from the bridge before tripping is initiated and not supplying any energy to the trip coil and only supplying energy to the trip coil after tripping is initiated and not monitoring any signal from the bridge.