Low-voltage circuit breaker and method

A low-voltage circuit breaker for interrupting a low-voltage circuit, comprising:

• at least one first current sensor configured to determine a magnitude of an electrical current of the low-voltage circuit,
• an interrupter with contacts configured to interrupt the low-voltage circuit,
• an electronic trip connected to the first current sensor and the interrupter and configured such that an interruption of the low-voltage circuit is instigated upon at least one of a current limit value or current period limit values being exceeded, and
• a power supply configured to supply power to the electronic trip and to at least one additional component of the low-voltage circuit breaker, wherein
• a second current sensor is between the power supply and the at least one additional component, said second current sensor configured to determine a magnitude of a current of the at least one additional component, and
• the second current sensor is connected to evaluation electronics, the evaluation electronics configured to initiate an interruption of the current to the additional component upon a threshold value of the current of the additional component being exceeded.