Protection device for an electrical circuit, electrical circuit equipped with such a device and method for protecting such an electrical circuit

A protection device for an electrical circuit configured to transmit an electric current, the protection device comprising:

• a first conductor,
• a second conductor,
• at least one circuit breaker for interrupting an electric current, the circuit breaker comprising a control zone, capable of receiving a tripping signal, and a power zone for passing the electric current, and
• a control circuit configured to produce and transmit the tripping signal (S) to the control area of the circuit breaker,
• wherein the device further comprises a fuse connected in series between the first conductor and the circuit breaker in such a way that the current flowing through the fuse passes integrally through the power zone of the circuit breaker when the power zone is in a state allowing the passage of the current, the fuse being capable of supplying a supply voltage to the control circuit
• and wherein the control circuit is connected between the fuse and the control zone of the circuit breaker.