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VGD – 12KV

Vacuum Circuit Breaker

VGD-12 series 12KV indoor high voltage vacuum circuit breaker has a compact design. It is suitable for
650mm width switchgear, used as protection and control unit of power equipment of industrial & mining
enterprise. Due to the super excellence, it is especially suitable for locations where requires the frequent
operation under rated working current or multiple breaking under short circuit breaking current. The
circuit breaker adopts the integrated design of operating mechanism and circuit breaker body, servers as
not only fixed installation, but also draw-out type equipped with a special propelling mechanism.
VGD-12 has two main types. One is Draw-out type. Model No. is VGD-12D. The other is Fixed type. Model No. is VGD-12F.

999
No. Item Unit parameter
1 Rated voltage KV 12
2 Rated frequency Hz 50
3 Rated lightning impulse withstand voltage (1 min) KV 75
4 Rated short-time power frequency withstand voltage (1 min) KV 42
5 Rated short-circuit breaking current KA 20 25
6 Rated current A 630 1000

1250

630 1000

1250

7 Rated peak withstand current KA 50 63
8 Rated shorted-time withstand current (4S) KA 20 25
9 Power frequency withstand voltage of secondary circuit (1min) V 2000
10 Rated operation sequence O-0.3s-CO-180s-CO
11 Rated breaking current of (single/back to back)capacitor bank A 630/400
12 Opening time(rated voltage) ms 20~50
13 Closing time(rated voltage) ms 30~70
14 Rated short-time current breaking times Times 50
15 Mechanical life Times 30000
16 Rated opening/closing voltage V AC110,220; DC110,220
17 Rated voltage of energy-storage motor V AC110,220; DC110,220
999-1