Circuit breaker and method for checking a Rogowski converter in a circuit breaker

摘要

A circuit breaker is disclosed. A Rogowski converter is checked for wire breakage by applying a voltage to the Rogowski converter which is output by a digital/analog converter in response to a digital signal. The digital signal is dependent on the switch rated current of the circuit breaker.

主权项

1. A circuit breaker, comprising:
at least one switching contact including a Rogowski converter; an amplifier stage configured to amplify output signals from the Rogowski converter; a data processing device configured to evaluate the amplified output signals and configured to prompt at least one of the at least one switching contact to open based upon a result of the evaluation; and a device configured to apply a DC voltage to the Rogowski converter, the device including a digital/analog converter and being operatively coupled to a communication bus, the device further being configured to digitally prescribe a value for the DC voltage for conversion by the digital/analog converter.