Earth Fault & Short Circuit Indicator detects faults in phase and ground faults in underground networks. It generates a fault signal when the currents exceed the adjustable fault current threshold value and again during the adjustable fault current detection period. When the fault current occurs, internal signal LED, LCD display and external signal lamp give an information to the user. The fault information can be transferred with dry contact(s) on the device via SCADA or other utility applications. The signal LEDs flash for 2 seconds in the first half of the reset period and 4 seconds in the second half of the reset period and the phase current or earth current symbol for the fault flashes at the same period as LED at the main page. After the fault current is removed, the device is automatically reset after 3 seconds. The operator can also reset the device via digital input (remote reset), interface or communication. The digital input is optically isolated. The last 20 events are listed together in the event page with the fault current value, the phase at which the fault occurred, date and time information.
Specifications:
Current Transformer
ESI is used for the detection of fault in medium voltage underground networks. The current information that is received from the three current transformers (separate for each phase) connected to the underground network cables detect the phase and earth faults and show the fault status information with the indicators on the main unit and external signal lamp