Arc-quenching aid with externally applied magnetic blow-out coil for switching off currents

摘要

The device includes switching equipment (2) for switching current direction in the quench electric circuit on signal from data entry equipment (7), which has two Hall sensors (1) and subtracter for subtracting output signals of the sensors. Data entry device has a comparator for comparing the output signal of subtracter to threshold value and an amplifier for amplifying output signal of the comparator. The sensors may be Hall sensors, which form part of the head electric circuit containing parallel coil whose charge is not influenced by switching equipment. Sensitive Hall sensors for current direction recognition are arranged at small gaps from one another for circuit measuring current in head circuit of DC power switch.