Patent ID: 8106667
Filing Date: 2012-01-31
Classification: G01R,Y04S

Abstract:
1. An insulation measurement apparatus, comprising: a path comprising: a first switching element provided in a path from the positive electrode side of the power supply to the capacitor; a second switching element provided in a path from the capacitor to the negative electrode side of the power supply; a detection section configured to: a voltage setting section configured to execute: wherein a charge resistance value at a time of charging the capacitor by the voltage of the power supply in the power supply voltage measurement mode is set to be a sum of a value of the first resistor and a value of the second resistor, wherein a charge resistance value at a time of charging the terminal of the positive electrode side or the negative electrode side of the capacitor via the insulation resistor between the positive electrode or the negative electrode of the power supply and the ground potential in the insulation voltage measurement mode is set to be a sum of the value of the first resistor or the value of the second resistor and the insulation resistor, wherein each of the value of the first resistor and the value of the second resistor is set to be same as an insulation resistance value of a threshold value of a value representing the insulation state, and wherein a voltage applied to the capacitor and the voltage applying time period thereof when the detection section determines that the insulation state coincides with the threshold value are respectively same as a voltage applied to the capacitor and the voltage applying time period thereof at a time of charging by the voltage of the power supply.