FIELD: physics.
SUBSTANCE: present invention relates to protective device (2) for electrical circuit (1), comprising first fuse (8), pyrotechnical switch (12) connected in parallel to the first fuse and having control region (16) capable of receiving an initiation signal (S), and power area (18) for passage of electric current. Device also comprises control circuit configured to generate and transmit initiation signal to control area. Device includes a second fuse, connected in series between first input conductor (4) and a first fuse and configured to supply voltage (V) of power supply to a control circuit which is connected between the second fuse and the control region.
EFFECT: technical result is reduction of power losses and improvement of circuit breaker operation.
10 cl, 6 dwg
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