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Product description

ZN63A-12KV indoor high voltage vacuum circuit breaker is aindoor equipment with three phase AC 50Hz and rated voltage of 12kV, which can be used for the control and protection of electrical facilities in industrial and mining enterprises, power plants and substations, and is suitable for frequent operation places.

The voltage vacuum circuit breaker can be operated frequently and has the ability to break and reclose multiple times. The product is designed as front-rear assembling structure, it not only can be used as fixed installation unit, but also can be used as handcart unit through equipping with chassis, and has a reliable interlocking function.

ZN63A 12KV circuit breaker meet the standards: GB/T1984 and JB/T3855.

Working condition

1. Ambient air temperature: -15~+40℃

2. Altitude: ≤2000m

3. Humidity: Daily average value ≤95%，Monthly average value ≤90%;

4. Water vapor pressure: Daily average value ≤2.2kPa; Monthly average value ≤1.8kPa

5. The external shocking and earthquake could be neglected

6. No operating in such places as subject to dust, smog, corrosive / flammable gas, vapor and salt pollution.

Technical Specification

Rated voltage: 12kV

Rated lightning impulse withstand voltage (peak): 75kV

1min power frequency withstand voltage: 42kV

Rated short-circuit breaking current: 20, 25, 31.5, 40kA

Rated current: 630, 1250, 1600, 2000, 2500, 3150, 4000A

Rated thermo stability current (valid): 20, 25, 31.5, 40kA

Rated dynamic stability current (peak): 63, 80, 100kA

Rated short-circuit making current (peak): 50, 63, 80, 100kA

Rated operations of short-circuit breaking current interruption: 50times

Power frequency withstand voltage of secondary circuit (1min): 2000V

Rated operation sequence: O-0.3s-CO-180s-CO；O-180s-CO-180s-CO(40kA)

Rated thermo stability time: 4s

Rated back to back capacitor bank breaking current

Mechanical life: 20000times; 10000 times (40kA)