INSULATION RESISTANCE MEASUREMENT CIRCUIT HAVING SELF-TEST FUNCTION WITHOUT GENERATING LEAKAGE CURRENT

摘要

An insulation resistance measurement circuit in which switching of first and second switches is controlled such that a leakage current may not be generated in measuring insulation resistance, and voltages output through first and second operational amplifiers are measured after opening the first and second switches and closing third and fourth switches for self-testing of the insulation resistance measurement circuit.