Short Circuit and Earth Fault Indicator EKL3

Description

(for 3kV-40.5kV Power Distribution Networks)

—EKL3

Short Circuit and Earth Fault Indicator indicates high voltage power line short circuit fault by detecting the 3 single-phase line-currents and short circuit currents, and the grounding fault by detecting the zero sequence currents. With visual or audible indicators, it helps line patrol staff to fast find out the location where there is a short circuit or grounding fault on the 3kV-40.5kV power distribution networks, switchgears or cable branching units etc.

Short circuit fault alarm indication

Short-circuit fault sensors installed on 3 single phase cables, monitoring the current changes of the power supply lines, when the current change value reach or exceed Threshold currents for short circuit alarm (this value can be set as per user requirement), the short circuit fault sensors output alarm signal, through optical fiber the signal will be sent to the indicator host, the corresponding fault indicator light will flash to alarm the short circuit fa

 

Earth fault alarm indication

Earth fault sensor installed on the bifurcation unshielded part of three-phase cable, detection the zero sequence current value of the three-phase cable, when its value reach or exceed Threshold currents for grounding fault alarm (this value can be set as per user requirement), the earth fault sensor outputs alarm signal, through optical fiber the signal will be sent to the indicator host, the earth fault indicator light will flash to alarm the earth fault.

 

Product Features

• Short-circuit and earth fault detection with 3 single-phase current sensors, and one grounding current sensor
• Short-circuit indication (3 single phase L1,L2,L3) by three super bright LEDs respectively
• Earth fault indication by one super bright LED display
• Remote indication via 2 relay contacts
• Auxiliary power supply: 24V-230V DC/AC or built-in Li-ion battery with low-power-status indication
• Reset/Test Button
• Remote reset
• Auto-reset: 7s/8h/12h/24h reset time for options

Technical Data

Model number			EKL3
Voltage level			3kV-40.5kV
Ambient	temperature		-25°C to +70°C
	humidity		≤95%
Threshold currents for short circuit alarm			150A-2000A
Threshold currents for grounding fault alarm			10A-100A
alarm current accuracy			±10%
alarm response time	short circuit fault		40ms
	grounding fault		40ms
working current	stand by		≤10uA
	indication alarm		≤0.5mA
auto reset time			7s/8h/12h/24h
auxiliary power supply	built-in battery		Li-ion 3.6v2.25Ah
	external		24V-230V DC/AC
capacity of relay contact			2A 30VDC/1A 125VAC
applicable conductor diameter	short circuit sensor	type A	Φ20mm~Φ40mm
		type B	Φ30mm~Φ50mm
		type C	Φ50mm~Φ70mm
	grounding sensor	type A	Φ60mm~Φ100mm
		type C	Φ80mm~Φ130mm
protection class	indicator		IP40
	sensor		IP65
fiber cable length for short circuit sensor			1.5m can be customized
fiber cable length for grounding sensor			2.5m can be customized
panel window size (WxH)			92x45mm
indicator size (WxHxD)			96X48x69mm
sensor size (WxHxD)			40x44x27mm

 

Product Dimensions

Terminal Diagram

Terminal Definitions

 

No.	Marks		Definitions
L1	Terminal		Optic fiber terminal of short circuit sensor for Phase L1
L2			Optic fiber terminal of short circuit sensor for Phase L2
L3			Optic fiber terminal of short circuit sensor for Phase L3
5	White	Earth Fault Sensor	White cable terminal of earth fault sensor
6	Brown		Brown cable terminal of earth fault sensor
7	not connected		not connected
8
9
10	White	Blinking Lamp	White cable terminal of external alarm device
11	Brown		Brown cable terminal of external alarm device
11	Remote Reset		Remote reset terminal
12
13	Relay		Common contact of fault signal remote transmission relay
14			Normally-closed contact of fault signal remote transmission relay
15			Normally-open contact of fault signal remote transmission relay

 

Ordering Information