Description: I. Introduction WHLEKL-3 short-circuit fault indicator is supporting the installation of the power distribution network system ring network, cable branch box, the box changes to indicate the corresponding section of the cable short circuit and single phase a real-time monitoring of device failure. The indicator for troubleshooting provides the best way to find! When the line fails, short circuit or ground sensor signal is received by the optical fiber transmission to the host, the host receives the signal panel indicator lights red flashes, the time can be set. Flashing green artificial detection nine. Second, the main function of a short-circuit current alarm indication: Short-circuit current sensor in the work of the high-voltage cable running line detection, when the line current reaches or exceeds the short-circuit current setting value (available upon request at the factory setting) After the short circuit the sensor alarm signal this signal is received by the optical fiber transmission to the host, the host, generating a corresponding alarm indication signal. 2, grounding alarm indication: The system uses ground sensors to detect user cable ground currents, when the ground line current reaches or exceeds the ground current start alarm value (can be carried out in the factory according to user requirements tuning), ground sensor alarm signal transmission After the host, the host receives this signal, producing a corresponding alarm indication signal. 3, panel host instructions: Panel host receives a short circuit or ground pass over the sensor signal, LED lamps emit red light flashing alarm. (1) automatically reset the system: When the indicator alarm signal within 24 hours if there is no manual reset, the indicator will automatically reset. (Time can be set) (2) Manual reset: When an alarm indicator, by pressing the reset button on the indicator panel disarm the alarm host, manual reset. (3) Testing: The system can be self-test work by the Clear button on the control panel to check the machine's functions. Continuously press the Clear button on the control panel for 2 seconds, the unit enters the POST, all green lights shining on the panel, the output relay, the operation status is normal. Third, the main technical parameters: short-circuit fault operating current: 800A earth fault operating current: 100A Accuracy: ± 10% Ambient temperature: -25 ~ + 70 ℃ Humidity: + 40 ℃ Relative humidity ≤95% Power: Standby ≤0.01mA ; instructions ≤0.5mA power supply: Lithium battery 3.6V / 2.25Ah automatic reset time: You can set the output relay contact capacity 12H 24H: 230V AC 1A / 125VDC 1A / 30VDC 2A four panel hole size: 92 (mm) X44 (mm)