Fault current circuitbreaker, differential current circuit breakers, as well as a multipurpose appliance comprising circuit breaker and fault current circuitbreaker or differential current circuit breakers

摘要

In the case of fault current protection switches or difference current protection switches is used in the prior art, a test key for this purpose, to close a test circuit, so that a fault current simulating test current flows and so it is checked whether the circuit breaker are operating correctly. According to the invention, instead of a test key a test lever body (16) is used. This is preferably pivotable around the same axis as the usually provided turn-on - off - operating lever (12) of the circuit breaker, and the movement of the test lever body (16) is connected to these operating lever (12) can be partially. In a predetermined position of the test lever body (16) of the test circuit is closed. Preference is given to this predetermined position an intermediate position of the test lever body between two end positions, so that the test current flows only for a short period of time.