CPC H01H 9/106 (2013.01) [H01H 85/0241 (2013.01); H01H 85/143 (2013.01)] | 10 Claims |
1. 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,
a control circuit configured to produce and transmit the tripping signal (S) to the control area of the circuit breaker, and
a diagnostic system comprising:
a first sensor for measuring a current flowing in the control zone,
a second sensor for measuring a current flowing in the power zone; and
an electronic processing unit programmed to compare the current values measured by the first sensor and the second sensor and to detect a failure of the protection device according to the measured current values,
wherein the device further comprises a fuse connected in series between the first conductor and the circuit breaker in such a way that a current flowing through the fuse passes entirely 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.
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