12KV environmentally friendly (air insulated without SF6 gas) vacuum circuit breaker switch under isolation
Key attributes
| Brand | Switchgear parts |
| Model NO. | 12KV environmentally friendly (air insulated without SF6 gas) vacuum circuit breaker switch under isolation |
| Rated voltage | 12kV |
| Rated normal current | 630A |
| Rated short circuit breaking current | 25kA |
| Series | VHK-12 |
Product descriptions from the supplier
The isolation circuit breaker switch on VHK-12 environmental protection cabinet adopts a semi sealed structure, which has the advantages of uniform electric field, reliable disconnection, long service life, maintenance free and easy installation. This product is mainly used for isolation unit solutions on environmentally friendly air insulated ring main units. As the main component inside the cabinet, it undertakes the functions of closing and opening the main circuit, and has functions such as closing and opening rated load current and closing and breaking short-circuit current.
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) Place of use: no flammable or explosive hazards, no water vaporization, corrosive gases, and severe vibration phenomena; 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.
Model description
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 |
Vacuum Arc Extinguishing Chamber + 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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