12KV environmentally friendly (air insulated SF6 gas free, nitrogen filled) isolation switch
Key attributes
| Brand | Switchgear parts |
| Model NO. | 12KV environmentally friendly (air insulated SF6 gas free, nitrogen filled) isolation switch |
| Rated voltage | 12kV |
| Rated normal current | 630A |
| Series | GHK |
Product descriptions from the supplier
The GHK-12 PT isolation switch adopts an integrated spindle structure, which has the advantages of uniform electric field, good synchronization, long service life, maintenance free and easy installation. This product is mainly used in environmentally friendly air insulated ring main unit cabinets as the main component in PT unit cabinets, responsible for functions such as PT main circuit closing, opening, and grounding.
Environmental conditions for use:
1) Environmental temperature: maximum temperature+40 ℃, minimum temperature -15 ℃ (storage and transportation allowed at -30 ℃);
2) Altitude: ≤ 2000 meters;
3) Environmental humidity: Daily average relative humidity ≤ 95%, monthly average relative humidity ≤ 90%;
4) Seismic intensity: not exceeding 8 degrees;
5) Location of use: No flammable or explosive hazards, no water vaporization, corrosive gases, or severe vibrations;
For special usage scenarios that differ from normal operating conditions, the product user must agree with the manufacturer. For example, when electrical equipment is installed at an altitude of over 2000 meters, special instructions must be made for the manufacturer to adjust the product during production.
Product Parameters
Serial Number |
Item |
Unit |
Parameter |
Remark |
1 |
Rated Voltage |
KV |
12 |
|
2 |
Rated Current |
A |
630 |
|
3 |
Rated Breaking Current / Thermal Stability Time |
KA/S |
20/4; 25/3 |
|
4 |
Rated Peak Withstand Current |
KA |
50/63 |
|
5 |
Rated Short-circuit Making Current |
KA |
50/63 |
|
6 |
Short-circuit Making Times |
times |
30 |
|
7 |
Power Frequency Withstand Voltage: Phase-to-Ground / Phase-to-Phase |
KV |
42 |
In Dry Air or N₂ |
8 |
Power Frequency Withstand Voltage: Break |
KV |
48 |
In Dry Air or N₂ |
9 |
Lightning Impulse: Phase-to-Ground / Phase-to-Phase |
KV |
75 |
In Dry Air or N₂ |
10 |
Lightning Impulse: Break |
KV |
85 |
In Dry Air or N₂ |
11 |
Main Circuit Resistance |
μΩ |
≤60 |
Disconnector |
12 |
Mechanical Life of Arc Extinguishing Chamber |
times |
10000 |
|
13 |
Mechanical Life of Isolation / Earthing Switch |
times |
5000 |
|
14 |
Gas Tank Pressure |
bar |
1.25 |
Installation dimensions
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