Indoor Circuit Breakers

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High Voltage Vacuum Circuit Breaker 12kV 630A

Model ZN63(VS1)-12

ZN63(VS1) indoor high-voltage alteratingcurrent vacuum circuit breaker has a frequency of 50Hz and a rated voltage of 12kV. It applies to the ecrical equipment control and protection in industial and mining enterprises, power plants and substations, priculanty to the places needing frequent operation. It can be fixed in a switch cabinet or nstalld on a handcart.
With stable performance and convenient intallation, it is the best choice for the control and protection of hig-voltage power transmission and distribution systems.

product details

Model description

Technical Parameter

Item	Units	Parameters
Rated voltage	KV	12
Rated current	A	630-3150
Rated short- circuit breaking current	KA	20	31.5	40
Rated short- circuit closing current	KA	50	80	100
Rated dynamic steady electric current(peak)	KA	50	80	100
Rated thermal stability current(RMS)	KA	20	31.5	40
Rated thermal stability time	S	4
The breaking times of rated short circuit breaking current	Times	30 (50)
Open time of CD10 electromagnetic operating mechanism	mS	< 80
Rated operating sequence		O-0.3s-CO- 180s-CO
A minute power frequency withstand voltage(RMS)	KV	The phase 42, section 48
Lightning shock pressure	KV	The phase 75, section 85
Mechanical life	Times	10000
Note: 20KA,31.5KA t=0.3s t 1= 180s 40KA t=180s t 1= 180s.

product description

Power supply conditions

Within the factory production ZN28G-12 series indoor high voltage vacuum circuit breaker, can be equipped with CT17, CT19 spring mechanism and CD17 electromagnetic mechanism.

Ambient condition

1. Altitude:≤1000m;

2. The ambient temperature: not higher than +40℃. not less than 10℃(-30℃ is permitted storage)

3. Earthquake does not exceed degree 8;

4. Relative humidit: daily average value is not greater than 95%.monthly average is not greater than 90%; air relative humidity on average less than 2210-3Mpa. on average less than 1.810-3Mpa.

5. The surrounding air is not corrosive and flammable gas, steam and other significant plluion;