Voltage insulation monitoring device with function of voltage deviation compensation and voltage deviation compensation method thereof
An insulation monitoring device and voltage deviation technology, which is applied in the direction of circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., can solve the problem of excessive voltage deviation of the DC system to the ground and hidden dangers left in the safe operation of the DC system, etc. problems, to achieve the effect of ensuring safe operation and eliminating potential safety hazards
Active Publication Date: 2015-04-08
SHANDONG ZHIYANG ELECTRIC
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The invention relates to a voltage deviation regulator for an insulation monitoring device, in particular to an insulation monitoring device with the function of voltage deviation compensation. The insulation monitoring device comprises a balance bridge circuit and a compensation circuit; the compensation circuit comprises an anodic compensation triode and a cathodic compensation triode; a collector of the anodic compensation triode is connected to an anode of a direct current bus; an emitter of the anodic compensation triode is connected to a ground wire through a current limiting resistor R3; a collector of the cathodic compensation triode is connected to the ground wire; an emitter of the cathodic compensation triode is connected to a cathode of the direct current bus through a current limiting resistor R4; a base of the anodic compensation triode and a base of the cathodic compensation triode are connected to a changeover switch respectively through a current limiting resistor R5 and a current limiting resistor R6; the changeover switch is connected to a control unit. Deviation of voltage-to-earth of a direct-current system is precisely compensated. The invention further provides a voltage deviation compensation method; current between the collectors and the emitters is smoothly controlled, running safety of the direct current system is guaranteed, and safety hazards are eliminated.
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