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ZN63 (VS1) -12 Series type indoor high voltage vacuum circuit breaker is rated voltage 12kV, three-phase AC 50Hz Indoor high-voltage switchgear.

Working Conditions

1.Ambient temperature: not higher than +40 °C, not less than -15°C

2. Altitude: not exceed 1000m.

3. Relative humidity: daily average of not more than 95%, month average of not more than 90%.

4. Earthquake intensity: not more than ten.

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

Specification

NO	Item	Units	parameters
1	Rated voltage	KV	12
2	Rated Frequency	HZ	50
3	Rated Current	A	630.1250.1600.2000.3150
4	Rated short-circuit breaking current	KA	20 25 31.5
5	Rated short-circuit closing current (peak)	KA	50 63 80
6	Rated short-circuit duration	S	4
7	Rated short-circuit breaking current breaking number	nos	50s
8	Rated operating sequence		0-0.3s-CO-180s-CO
9	Rated lightning impulse withstand voltage	kv	125
10	1min power frequency withstand voltage	KV	65
11	Closing time	ms	≤ 70
12	opening time	ms	≤ 50
13	Mechanical life	Times	20000
14	Rated Storage and operation voltage	V	AC DC 220/110
15	Breaking life	ms	≤ 80
16	Storage life	s	≤ 10

Adjust the parameters of mechanical properties:

No	Item	Unit	Parameters
1	Contact distance	mm	14±1
2	Contact Over-travel	mm	3.5±1
3	Closing speed	m/s	1.0±0.2
4	Opening speed	m/s	1.3±0.2
5	Contact closing spring time	ms	≤2
6	Rated contact pressure	N	20KA(2400±200) 25KA (2400±200) 31.5KA(3100±200)
7	Three phase closing opening asynchrony	ms	≤2