Electrical field insulation resistance tester multi-point automatic testing system
Insulation resistance tester can continuously monitor the insulation resistance of electrical equipment,and timely feed-back test results.Therefore,the multi-point automatic testing system of electrical field insulation resistance tester is designed to en-sure the safe operation of electrical equipment.Using single chip computer to generate reference voltage;The reference voltage is pro-cessed by the active clamp voltage doubling converter,and the stable high voltage is output.The simulated partial voltage signal is ob-tained by using the partial voltage resistor module to deal with high voltage.According to the switch module,the analog voltage partial signal is connected to multiple detection points of the electrical equipment under test;The analog partial voltage signal of each detec-tion point is collected by signal acquisition circuit;An integral oversampling ADC is used to convert the analog partial voltage signal to obtain the digital partial voltage signal.The main test module obtains the insulation resistance measurement results of each detection point according to the digital voltage division signal of each detection point,and completes the multi-point automatic insulation resist-ance detection.The display and control module presents the multi-point automatic detection result of insulation resistance for the us-er.Experimental results show that the system can deal with reference voltage effectively to obtain stable high voltage.The difference linear error and integral linear error of the system are low.This system can effectively measure multi-point insulation resistance of e-lectrical equipment and complete multi-point automatic detection.
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