Intermittent leakage alarm system

The invention discloses an intermittent leakage alarm system which comprises a detection device, a handheld device and a communication medium for connecting the detection device with the handheld device. The detection device comprises a power supply, an operational component, a storage component, a leakage current transformer, a leakage current metering component, a status indicator lamp and a data interface, and the handheld device comprises a power supply, an operational component, a storage component, a touch screen and a data interface. When the intermittent leakage alarm system is used, firstly, the detection is mounted at the position of a circuit to be detected, leakage current is automatically detected for a period of time, secondly, a leakage current alarm threshold at a positionis set at the handheld device, the handheld device is connected with the detection device through a communication data line, thirdly, historical data stored by the detection device are read, leakage conditions of the circuit