12KV Indoor Vacuum Circuit Breaker

Type: ZN63
VS1 series vacuum circuit breaker(VCB) is indoor high voltage switch-gear with rated voltage 12kV, three-phase AC 50Hz, which is developed by introducing from Switzerland, ABB Corporation technology and analyzing domestic profession development condition, productivity development manufacture product. The overall structure of this product is formed with the switch main body and operating device, uses the compound insulation structure, does not have the pollution and the explosion hazard, and the insulation level is high.
This operating device of the series product is for the spring loaded type, can use the electrically operated operation, also can use the manual operation.

No.	Item	Unit	Value
1	Rated voltage	kV	12
2.	Rated lighting impulse withstand voltage(peak)		75
3	Rated short-time power frequency withstand voltage(1min)		42
4	Rated frequency	Hz	50
5	Rated short circuit breaking current	kA	20	25	31.5	40
6	Rated current	A	630 1250	630 1250	1250 1600 2000	1600 2000 2500 3150
7	Rated short-time withstand current	kA	20	25	31.5	40
8	Rated peak withstand current		50	63	80	100
9	Rated short-circuit making current(peak)		50	63	80	100
10	Power frequency withstand voltage of secondary circuit(1 min)	V	2000
11	Rated operation sequence		Off-0.3s-on&off-180s-on&off Off-180s-on&off-180s on&off
12	Rated short-circuit current duration	s	4
13	Rated breaking current of single/back-to-back capacitor bank	A	630/400(40kA with 800/400)
14	Rated making surge current of capacitor bank	kA	12.5(frequency is no more than 1000Hz)
15	Opening time (rated voltage )	ms	20-50
16	Closing time (rated voltage )	ms	30-70
17	Mechanical life	times	20000
18	Rated short-circuit current breaking times	times	50(30 for 40kA)
19	Permissible wear thickness of moving and static contacts	mm	3