Short Circuit and Earth Fault Indicator EKL5

Description

(for 3kV-40.5kV Power Distribution Networks)

—EKL5

Utility Model Patent Product

Patent Number: ZL 200820006528.X

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 fault.

 

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: 8h/12h/24h/48h reset time for options

Technical Data

Model number EKL5
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 ≤5uA
indication alarm ≤0.8mA
auto reset time 8h/12h/24h/48h
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
1  Fault Remote Relay Common contact of fault signal remote transmission relay
2 Normally-closed contact of fault signal remote transmission relay
3 Normally-open contact of fault signal remote transmission relay
4 Low Power Relay Common contact of low battery signal remote transmission relay
5 Normally-closed contact of low battery signal remote transmission relay
6 Normally-open contact of low battery signal remote transmission relay
7 Remote Reset Remote reset terminal
8
8 Blinking Lamp White cable terminal of external alarm device
9 Brown cable terminal of external alarm device
11 Brown Earth Fault Sensor Brown cable terminal of earth fault sensor
12 White White cable terminal of earth fault sensor

 

Ordering Information

 

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