| 摘要 |
The device of the invention comprises a six-phase bridge 4 and, looped to this bridge, a circuit breaker control resistor 6 for two-phase and three-phase faults, a Zener diode 10 and a Darlington transistor 36 to create energy for supplying the striker of the circuit breaker, energy stored in a capacitor 11. The control signal for the resistor 6 is amplified by an amplifier 18 and detected by an amplifier 21, in order to control a thyristor 26 actuating the circuit breaker. In the case of a homopolar fault, there is provision for a separate processing unit 29 with a control resistor and a same threshold detection, at the output of an isolating transformer 28 looped to the bridge 4. <IMAGE>
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