FIELD: electrical equipment.
SUBSTANCE: invention relates to the electrical equipment. Disclosed are systems using a switching system associated with a power supply and underground pumps for pumping life from under the surface of the earth. First capacitor is located between the first switching device and the first transformer and stores electric energy received from the first transformer in order to activate the first switching device. Bias capacitor is located between the first capacitor and the first switching device and receives bias voltage through the second transformer. Bias capacitor applies bias voltage to the first switching device to prevent activation of the first switching device, except for the case, when the voltage combination received by the first switching device through the first transformer and the bias voltage is at least the same as the activation voltage of the first switching device.
EFFECT: technical result consists in reduction of weight and dimensions of power supply system.
20 cl, 27 dwg
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