Balancing double-switching circuit and insulation detection device and method based on the same
A detection device, double switching technology, applied in measurement device, grounding resistance measurement, measurement of resistance/reactance/impedance, etc., can solve the problems of inability to realize real-time detection of system insulation status, false detection, low insulation resistance, etc.
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[0058] In the following, the detection device and detection method of the present invention will be further described with actual detection examples in conjunction with the drawings.
[0059] figure 2 It is a schematic diagram of the real-time insulation detection device for the DC power supply system of the present invention. In the figure, DC+ represents the positive bus, DC- represents the negative bus, and PE represents the ground. Resistors R1 and R2 are the detection resistance of the bus voltage, R1> > R2. Resistors R5 and R6 are the detection resistance of the negative bus to ground voltage, R5> > R6. The resistors R3, R4, R5, and R6 constitute the voltage divider resistance between the ground and the positive and negative bus bars, and R3+R4=R5+R6. Resistance R b + Is the balance resistance between the positive bus and the ground, which is closed and disconnected by the switch S1, the resistance R b -It is the balance resistance between the negative bus and the ground,...
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