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Description
(for 3kV-40.5kV Power Distribution Networks)
—EKL2
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 one super bright LED
- 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 | EKL2 | ||
| 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 | Earth Fault Relay | Common contact of low battery signal remote transmission relay | |
| 8 | Normally-closed contact of low battery signal remote transmission relay | ||
| 9 | Normally-open contact of low battery signal remote transmission relay | ||
| 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 | Short Circuit 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
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