Vacuum Circuit Breaker 12kV
1. General Introduction
VS1-12 vacuum circuit breaker is widely used in indoor air-insulated switchgears rated 12kV, 50(60)Hz. It conforms to standards of GB1984、IEC 62271-100：2001、GB11022、IEC 60694 and DL/T 403. Under normal service conditions and within its technical data scope, VS1-12 vacuum circuit breaker can satisfy all kinds of operations of electric grids at normal or accidental conditions, including making and breaking short circuit current.
The embedded poles (primary main loop) of VS1-12 vacuum circuit breaker are made by APG techniques, embedding its vacuum arc extinguish chamber and upper and lower wire-outgoing ends with epoxy resin for an integration. The embedded poles improve the distribution of electric field around poles, enhance the insulation reliability, reduce adjustment operations of circuit breakers and pollution outside of chamber, and enhance its environmental applicability.
VS1-12 vacuum circuit breaker can made to be fixed type or withdrawable type; installed in the front or laterally installed.
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2.Normal Service Condition
- Ambient temperature: -15℃ ~ +40 ℃
- Altitude: ≤1000m
- Relative humidity:daily average relative humidity ≤ 95% monthly average relative humidity ≤ 90% Free from fire, explosion, heavy pollution, chemical corrosion and severe vibration.
- The earthquake intensity ≤ 8 degree
3.Technical Parameters
| No. | Item | Unit | Parameter | |||
| 1 | Rated voltage | kV | 12 | |||
| 2 | Rated frequency | Hz | 50（60） | |||
|
3 |
Rated short-time power frequency withstand voltage(1 min) | kV | 42 | |||
| 4 | Rated lightning impulse withstand voltage | kV | 75 | |||
| 5 | Rated current | A |
630 1250 |
630 1250 |
1250 1600 2000 |
1250,1600 2000,2500 3150 |
| 6 | Rated short-time withstand current | kA | 20 | 25 | 31.5 | 40 |
| 7 | Rated peak withstand current | kA | 50 | 63 | 80 | 100 |
| 8 | Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 |
| 9 | Rated short-circuit making current | kA | 50 | 63 | 80 | 100 |
| 10 | Rated operating sequence | / |
O-0.3s-CO-180s-CO O-180s-CO-180s-CO（40kA） |
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| 11 | Short-circuit current breaking times | times | 274 | |||
| 12 | Rated capacitor bank breaking current | A | 630/400 | |||
| 13 | Mechanical lifespan | times | 10000~30000 | |||
4.Dimensions (withdrawable type)
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Fixed tulip contact size (mm) |
Φ35 |
Φ49 |
|
Pole to pole distance (mm) |
150 |
|
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Fixed tulip contact size (mm) |
Φ35 |
Φ49 |
|
Pole to pole distance (mm) |
210 |
|
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Fixed tulip contact size (mm) |
Φ35 |
Φ49 |
|
Pole to pole distance (mm) |
275 |
|
|
Rated current (A) |
1600 |
2000 |
|
Rated short-circuit breaking current (kA) |
31.5，40 |
31.5，40 |
|
Fixed tulip contact size (mm) |
Φ55 |
Φ79 |
|
Pole to pole distance (mm) |
210 |
|
|
Rated current (A) |
1600 |
2000 |
|
Rated short-circuit breaking current (kA) |
31.5，40 |
31.5，40 |
|
Fixed tulip contact size (mm) |
Φ55 |
Φ79 |
|
Pole to pole distance (mm) |
275 |
|
|
Rated current (A) |
2500 |
3150 |
4000 |
|
Rated short-circuit breaking current (kA) |
31.5，40 |
31.5，40 |
31.5，40 |
|
Fixed tulip contact size (mm) |
Φ109 |
||
|
Pole to pole distance (mm) |
275 |
||
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Fixed tulip contact size (mm) |
Φ35 |
|
|
Pole to pole distance (mm) |
150 |
|
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Fixed tulip contact size (mm) |
Φ35 |
|
|
Pole to pole distance (mm) |
210 |
|
Dimensions (fixed type)
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Pole to pole distance (mm) |
150 |
|
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Pole to pole distance (mm) |
210 |
|
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Pole to pole distance (mm) |
275 |
|
|
Rated current (A) |
1600 |
2000 |
|
Rated short-circuit breaking current (kA) |
31.5，40 |
31.5，40 |
|
Pole to pole distance (mm) |
275 |
|
|
Rated current (A) |
2500 |
3150 |
4000 |
|
Rated short-circuit breaking current (kA) |
31.5，40 |
31.5，40 |
31.5，40 |
|
Pole to pole distance (mm) |
275 |
||
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Pole to pole distance (mm) |
150 |
|
|
Rated current (A) |
630 |
1250 |
|
Rated short-circuit breaking current (kA) |
20，25，31.5 |
20，25，31.5 |
|
Pole to pole distance (mm) |
210 |
|
