12kv Fixed Type Indoor High Voltage Vacuum Circuit Breaker
General Description
VIB3-12 series of indoor high voltage vacuum circuit breaker is applied to three phase,A.C 50(60)Hz,3.6~24kV electric system.It's used for mining and industrial enterprise,power plant,substation to switching and dividing load current,overcurrent,fault current, also applied for place with frequent operation.This series widely used for power station,power system,petrochemical,smelting,subway,airport,buildings project.
Applying ambient conditions and width of matched switchgear
Ambient temperature:max +40ºC,average temperature within 24h should less than 30ºC,min temperature -15ºC
The height above sea leval:≤1000m,can meet 4500m(need evaluate)
Relative humidity:daily average relative humidity≤95%,monthly average relative humidity≤90%
Saturated vapour pressure:daily average value≤2.2kPa,monthly average value≤1.8kPa
ambient air:without obvious dust,smog,corrosive or flammable gas,steam and salt mist pollution
Width of matched switchgear room:650mm,800mm,1000mm
Technical specification
Mechanical characteristic parameter
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General Description
VIB3-12 series of indoor high voltage vacuum circuit breaker is applied to three phase,A.C 50(60)Hz,3.6~24kV electric system.It's used for mining and industrial enterprise,power plant,substation to switching and dividing load current,overcurrent,fault current, also applied for place with frequent operation.This series widely used for power station,power system,petrochemical,smelting,subway,airport,buildings project.
Applying ambient conditions and width of matched switchgear
Ambient temperature:max +40ºC,average temperature within 24h should less than 30ºC,min temperature -15ºC
The height above sea leval:≤1000m,can meet 4500m(need evaluate)
Relative humidity:daily average relative humidity≤95%,monthly average relative humidity≤90%
Saturated vapour pressure:daily average value≤2.2kPa,monthly average value≤1.8kPa
ambient air:without obvious dust,smog,corrosive or flammable gas,steam and salt mist pollution
Width of matched switchgear room:650mm,800mm,1000mm
Technical specification
| Name | Unit | Date | |||||
| rated voltage | kV | 12 | |||||
| rated power frequency withstand voltage | kV | 42 | |||||
| rated lighting impulse withstand voltage | kV | 75 | |||||
| rated frequency | Hz | 50 | |||||
| rated current | A | 630 | 1250 | 1600 | 2000 | 2500 | 3150 |
| rated short circuit breaking current | kA | 20 | 20 | ||||
| 25 | 25 | 25 | |||||
| 31.5 | 31.5 | 31.5 | 31.5 | 31.5 | 31.5 | ||
| 40 | 40 | 40 | 40 | 40 | |||
| rated peak withstand current | kA | 50 | 50 | ||||
| 63 | 63 | 63 | |||||
| 80 | 80 | 80 | 80 | 80 | 80 | ||
| 100 | 100 | 100 | 100 | 100 | |||
| conductive circuit resistance of each phase | μΩ | ≤50 | ≤45 | ≤35 | ≤25 | ||
Mechanical characteristic parameter
| S.N. | Name | Unit | Data |
| 1 | distance between open contacts | mm | 9±1 |
| 2 | overtravel | mm | 3.5±0.5 |
| 3 | contact bouncing duration at closing operation | ms | ≤2(1600A Max) ≤3(2000A Min) |
| 4 | out of simultaneity of CO operation of three ploes | ms | ≤2 |
| 5 | opening time | ms | 20~50 |
| 6 | closing time | ms | 35~70 |
| 7 | average opening speed | m/s | 0.9~1.3 |
| 8 | average closing speed | m/s | 0.4~0.8 |
Our Factory
Our Certificates
Welcome for enquiry and factory visit!