Earthing Switch (EK6 Indoor High Voltage Earthing Switch)
Introduction
The EK6-12 (24) indoor earthing switch is a domestic advanced switch device made by improving and localizing the EK6 type earthing switch of German GALOR-EMAG company. Its performance is in line with GB1985-2004 AC High Voltage Disconnectors and Earthing Switches and IEC129 requirements.
The indoor high voltage earthing switch is applicable to 12kV-24kV AC 50Hz power system, offering grounding protection in the overhaul of high-voltage power equipment. It works with ABB-UniGear ZS1, ZS2, Siemens-NXAIR, Schneider-Nvnex and Tellhow-KYN28A type MV switchgears.
Service Conditions
1) Altitude: ≤1000m
2) Ambient air temperature: up to 40 ℃, down to -10 ℃, daily range of 15 ℃
3) Humidity: daily average relative humidity less than 95%; monthly average relative humidity less than 90%
4) Earthquake intensity: ≤ 8 degrees
5) Environmental conditions: no fire, explosion, severe dust, chemical corrosion and severe vibration;contamination class II.
2. □- 4S thermal current (kA)
3. 12(24)- rated voltage (KV)
4. 6-Design Number
5. EK-indoor earthing switch Technical Parameters
| Item | Unit | Value | ||
| Rated voltage | kV | 12 | 24 | |
| 4S thermal current | kA | 31.5/40 | 31.5/40 | |
| Dynamic current | kA | 80/100 | 80/100 | |
| Short-circuit making current | kA | 80/100 | 80/100 | |
| Pole-center distance | mm | 150/210/275 | 210/250/275 | |
| Rated insulation level | 1 min power frequency withstand voltage | kV | 42 | 65 |
| Lightning impulse withstand voltage | 75 | 125 | ||
| Mechanical life | cycles | 2000 | ||
| Model and Spec. | E | F | G | H | C | D |
| EK6-12/31.5(40)-150 | 150 | 75 | 204 | 535 | 396 | 300 |
| EK6-12/31.5(40)-210 | 210 | 50 | 324 | 655 | 516 | 420 |
| EK6-12/31.5(40)-275 | 275 | 50 | 454 | 810 | 646 | 550 |
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