1. Product name: ZW8-12 series outdoor high voltage vacuum circuit breakers
2. Rated voltage 12KV
3. Three-phase AC 50HZ

General: ZW8-12 series outdoor high voltage vacuum circuit breakers is high voltage outdoor

           Switch-gear with rated voltage 12KV, three-phase AC 50HZ, which is mainly used      for making and breaking load current, over-current, short-circuit current rural network, city network and miniature power system.

ZW8-12G is formed with ZW8-12 circuit breaker and isolation knife, called combined circuit breaker, may use for breaking switch.

Circuit breaker can be installed surge arresters, surge arresters can be installed in the entry according to user requirements, inter-office outlet side;
Circuit breaker can be equipped with inrush current controller, it has to eliminate inrush current and over-flow-off functions.

Main technical parameter

1. Rated voltage: 12KV

2.  Rated current: 630A,400A,200A

3.  Rated short circuit breaking current: 20KA,16KA,12.5KA

4. Rated short circuit making current (peak value): 50KA

5. Rated peak value withstand current : 50KA

6. Rated short-time withstand current: 20KA,16KA,12.5KA

7. Rated insulation level:

Power frequency withstand voltage (dry test): 42KV

Power frequency withstand voltage (wet test): 34KV

Lightning impulse withstand voltage (peak value): 75KV

8. Rated sequence of operations: O-0.3S-CO-180S-CO

9. Breraking times of rated short-circuit breaking current: 30times