INSULATION RESISTANCE MEASUREMENT DEVICE, INSULATION RESISTANCE MEASUREMENT METHOD, AND INSULATION MONITORING DEVICE

摘要

An insulation resistance measurement device for measuring the insulation resistance of a power generating unit comprising at least one solar cell module, wherein a measurement unit is provided that has a first measurement unit for measuring the voltage value or current value of a first resistive load between a positive electrode of the power generating unit and ground in a state where the positive electrode and ground are connected, a second measurement unit for measuring the voltage value or current value of a second resistive load between a negative electrode of the power generating unit and ground in a state where the negative electrode and ground are connected, and a third measurement unit for measuring the voltage value or current value of a third resistive load between the positive electrode and the negative electrode of the power generating unit in a state where the positive electrode and the negative electrode are connected, and the resistance value of the third resistive load is set to be less than or equal to the resistance value of the first and second resistive loads when the first and second resistive loads have the same resistance value and is set to be less than or equal to the smaller of the resistance values of the first and second resistive loads when the first and second resistive loads have different resistance values.