Xi'an Xigao Electricenergy Group Co., Ltd.
Xi'an Xigao Electricenergy Group Co., Ltd.
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ZN28A 12KV High Voltage Vacuum Circuit Breaker For Power Plants
1. ZN28A Series high-voltage vacuum circuit breaker
ZN28 High Voltage Vacuum Circuit Breaker is the indoor high voltage switchgear with 12kV rated voltage , three phase AC 50HZ . High Voltage Vacuum Circuit Breaker is mainly used for fixed type switch cabinet or substituting minimum oil circuit breaker in old-fashioned kinds, also applies to protecting and controlling unit of mobile switching equipment. It is suitable for occasions with frequent operation
2. Parameter of Vacuum circuit breaker
| No. | Item | Unit | Data |
| 1 | Rated voltage | KV | 12 |
| 2 | Rated insulation voltage | V | 42,75 |
| 3 | Rated current | A | 630,1250,1600,2000,2500,3150 |
| 4 | Rated short-circuit close current(peak value) | KA | 20,31.5,40 |
| 5 | Rated operation order | off--0.3s on and off--180S-on and off | |
| 6 | Rated short-circuit Breaking current times | times | 30(50),20(30) |
| 7 | Rated Impulse withstand voltage | KA | 50,80,100 |
| 8 | 4S Heat steady e.c.A | 20,31.5,40 | |
| 9 | all opened and broke time | ms | ≤100 |
| 10 | Mechanical life-span | times | 10000 |
| 11 | cumulated thickness of the moving and stationary contact | mm | 3 |
| 12 | Oil buffer buffers the journey | mm | 10 |
3. Environmental condition
Relative humidity: daily average ≤95% , monthly average ≤90% ;
Earthquake intensity: 8 degree;
Altitude: ≤1000m;
Ambient temperature: -25°C ~+40°C ;
It should work in occasions without flammable and explosive matter, without corrosive chemical and frequent severe vibration.
4. Technical diagram
5. Certificate
6. FAQ
1. Technology ensure the quality satisfy international request.
2．Generally we promise one - two years quality guarantee, some products will be extended longer time for life span.
3. For tender cooperation, it is welcome to discuss the detail in between.
4. Some type reports are provided accordingly.
5. Our factory is 250000m2 for production and office.
6. There are four subsidies in our group company. So our whole group company can produce switchgear, power transformer, load break switch, disconnect switch, vacuum/sf6 circuit breaker, fuse, surge arrester, CT PT, Metering unit.