Patent ID: 9041413
Filing Date: 2015-05-26
Classification: B60L,G01R

Abstract:
1. An electric leakage detection apparatus comprising: a coupling capacitor whose one end is connected to a DC power supply; a pulse generator that supplies a pulse to the other end of the coupling capacitor; a voltage detector that detects a voltage at the coupling capacitor charged with the pulse; an electric leakage determination unit that compares the voltage detected by the voltage detector to a first threshold and determines presence or absence of an electric leakage of the DC power supply based on a comparison result; and a discharge determination unit that compares the voltage detected by the voltage detector to a second threshold lower than the first threshold and determines whether the voltage becomes lower than the second threshold by a discharge of the coupling capacitor, wherein the pulse generator generates a new pulse when the discharge determination unit determines that the voltage becomes lower than the second threshold.