An earth-leakage differential circuit breaker or switch or differential current circuit breakers

摘要

In the case of a fault current circuitbreaker or differential current circuit breakers, a test key (16, 16 '') in the pivoting range of the handle (14) is disposed, with which the circuit breaker is a - and off. In particular, it is disposed in such a way that in the group consisting of - position of the handle (14) of the handle (14) at least partly for an operator is covered, and it does not have to be actuatable. As a result of this compact construction is space for an inscription on a control face (12) of the fault-current circuit breaker (10) is obtained.