Underground Fault indicator DYO-FF-FIS

Overview

Underground cable Fault indicator DYO-FF-FIS is a Four-Faith underground cable fault indicator family used in environments with higher precision requirements. The sensor based on the Rogowski coil has better sensitivity and supports the detection of short-circuit ground faults. Underground cable fault indicator has self-test and self-recovery functions. Underground cable fault indicator is suitable for 5-38KV power distribution ring network lines. Installed in substation cable outlets, RMU reduces fault location time and provides safety for public utility workers.

Feature and Benefit

Easy to install and use

The display panel adopts wall-mounted installation, which is simple and fast, and the sensor adopts threaded interface to quickly lock the cable
Reduce fault-finding time

Remote access to SCADA
Minimize the fault finding time, without opening the high-voltage cabinet, reducing personnel investigation
Various reset methods

Manual, time, automatic, remote Custom time reset, 12h, 24h to ensure enough time to find faults
Superior precision design

Based on Rogowski coil sensor, the accuracy can reach ±5%> When 100A, the protection level meets IP65

Technical Parameter

Parameter	value
Voltage class of cable power distribution lines	5-38KV
Short-circuit Trip Current (Phase to Phase)	200A/600A/800A/1000A，default 200A (±5%) adjustable by DIP switch
Short-circuit Response Delay Time	40ms/80 ms /100 ms /200ms，default 40ms，adjustable by DIP switch
Earth-fault Trip Current (Phase to Ground)	40A/80A/120A/160A，default 40A （±5%) adjustable by DIP switch
Earth-fault Response Delay Time	40ms/80 ms /100ms /200ms, default 40ms，adjustable by DIP switch
Fault Indication	Earth-fault: 1 Red LED
	Short-circuit: 3 Red LED
	Low Battery alarm: 1 Yellow LED
Reset of the Indicator	1. Manual by push button
	2. Timing Reset
	3. DI reset from SCADA
	4. Load current recovering reset (at least 10A)
	5. 220~240VAC recovering reset
	6. Communications by MODBUS
Power Supply	Lithium battery type AA 3.6V / 2.7Ah
Power Supply	5~36VDC external power supply
Communication	RS485: Data bits 8/Stop bits 1/Parity none/Baud Rate:9600
Communication	Protocol: MODBUS RTU
Installation	Display unit: wall-mounted installation
Dimensions	Indication unit (W x H x D)
Dimensions	100mm x 120mm x 45mm (exclusive cable gland)
Protection Class	Display unit: IP54
Protection Class	Sensors: IP68
Internal Type Test	According to IEEE495-2007
Operation Temperature Range	-40℃~+70℃
Short-circuit Sensor	3 short-circuit sensor cable length 2*m（Rogowski Coil Sensors）
Short-circuit Sensor	Diameter: 80mm
Earth-fault Sensor	1 earth-fault sensor cable length 2*m（Rogowski Coil) SensorDiameter: 110mm
Configuration	Setting via DIP switch