ZN63(VS1)-12 vacuum circuit breaker

ZN63(VS1)-12 = ABB VD4

ZN63 (VS1) -12 indoor high voltage vacuum circuit breaker is a three-phase AC 50Hz, rated voltage of 12kV indoor switchgear, control and protection for industrial and mining enterprises, power plants and substations, electrical facilities, and for frequent operation place. Adopting VET operating mechanism and circuit breaker integrated , design can be used as a fixed installation unit can also be equipped with special advance mechanism, the composition of handcart unit used. Some of the main circuit can use the whole solid seal post, in order to achieve smaller circuit breakers, high reliability, maintenance-free, can be equipped with KYN28A-12 (GZS) and other handcart switch cabinet in the home can also be used with fixed XGN switchgear.

 The use of environmental conditions:

1.Ambient temperature: not higher than +40 °C, not less than -10°C (at -30 °C to allow storage and transportation).

2. Altitude: not exceed 1000m.

3. Relative humidity: daily average of not more than 95%,saturated vapor pressure daily average of not more than 2.2 × 10-3MPa, month average not more than 1.8 × 10-3MPa.

4. Earthquake intensity: not more than eight.

5. No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense vibration.

Mainly technical parameters

NO	Item		Units	parameters
1	Rated voltage		KV	12
2	Rated insulation level	Rated Lightning Impulse voltage tolerance	KV	75
		1min Frequency voltage		42
3	Rated short-circuit breaking current		KA	20/25	31.5	40
4	Rated current		A	630 1250	630 1250 1600 2000 2500 3150	1250 1600 2000 2500 3150 4000
5	Rated thermal stability of current (RMS)		KA	20/25	31.5	40
6	Dynamic Stability rated current (peak			63	80	100
7	Rated short-circuit closing current (peak)			63	80	100
8	Rated short-circuit breaking current breaking number		times	50
9	Frequency tolerance of the secondary circuit voltage (1min)		V	2000
10	Rated operating sequence			0-0.3s-CO-180s-CO
				0-180s-CO-180s-CO(40kA)
11	Rated thermal stabilization time		S	4
12	Rated a single / back-to-back electric current breaking device group			630/400 800/400(40KA)
13	Mechanical life		Times	10000

ZN63(VS1)-12 vacuum circuit breaker