Indoor AC High Voltage Vacuum Circuit Breaker - Electrical Switch

Introduction - AC High Voltage Vacuum Circuit Breaker
MZ63A-12(VS1) Indoor AC High Voltage Vacuum Circuit Breaker applies to three-phase 50Hz, 7.2KV~12KV rated voltage power system. It is widely used in various loads of different properties and frequently operated places. It protects and controls the electrical devices in industrial mining enterprises, power plants and substation. It can configure KYN28A-12(GZS1) mid-insert handcart type Switchgear and XGN-□ fixed Switchgear. It meets national standards of GB1984 “AC High Voltage Circuit Breaker” , JB3855 “3.6~40.5KV Indoor AC High Voltage Vacuum Circuit Breaker” and IEC60056 “High Voltage AC Circuit Breaker” as well as DL/T403 Order Technical Conditions of 10~35KV Indoor AC High Voltage Vacuum Circuit Breaker .

Working & Environmental Conditions - AC High Voltage Vacuum Circuit Breaker
1. Altitude: ≤1000m
2. Environmental temperature: Maximum +40 °C, minimum -15 °C (storage at -30°C is allowed)
3. Humidity: Daily average relative humidity ≤95%, Daily steam pressure ≤2.2×KPa, monthly average relative humidity ≤90%, monthly steam pressure ≤1.8×KPa

Model Meaning
Main Technical Parameters - ZN63A-12(VSI) Vacuum Circuit Breaker

Name		Unit	Data
Rated voltage		KV	12	12	12	12	12
Rated frequency		HZ	50	50	50	50	50
Rated current		A	630, 1250	630, 1250	630, 1250, 1600	1250, 1600, 2000	2000, 2500, 3150
Rated insulation level	1 min work frequency voltage tolerance	KV	42	42	42	42	42
	Rated lightening impact current tolerance		75	75	75	75	75
Rated short circuit breaking current		KA	16	20	25	31.5	40
Rated short circuit closing current (peak value)			40	50	63	80	100
Rated peak value current tolerance			40	50	63	80	100
Rated short term current tolerance			16	20	25	31.5	40
Rated times of short term breaking current			50	50	50	50	30
Rated duration time of short circuit current		Second	4	4	4	4	4
(1min)secondary circuit work frequency voltage tolerance		V	2000	2000	2000	2000	2000
Rated operation sequence			O4-CO4′-CO
Mechanical life span			30000	30000	30000	30000	10000

*16KA, 20KA, 25KA, 31.5KA；T′=180S；40KA：T=180S, T′=180S

Mechanical Feature Parameters - ZN63A-12(VSI) Vacuum Circuit Breaker

name		Unit	Data
Contact openness size		Mm	11±1	11±1	11±1		11±1	11±1
Contact excess travel		Mm	3±0.5	3±0.5	3±0.5		3±0.5	3±0.5
Different periods of three-phase opening and closing switch		Ms	≤2	≤2	≤2		≤2	≤2
Closing switch and bouncing time		Ms	≤2	≤2	≤2		≤2	≤2
Central distance		Mm	210±1.5	10±1.5	10±1.5		10±1.5	10±1.5
Switch closing contact pressure		N	16 KA	20 KA	25 KA		31.5 KA	40KA
			2000±200	2400±200	2400±200		3100±200	4250±250
Average Switch opening time		M/s	1.1±0.2
Average Switch closing time		M/s	0.6±0.2
Opening the switch, when the operation pressure is	Maximum	Ms	≤50
	Rated		≤60
	Minimum		≤60
Switch closing time		Ms	≤100
Dynamic, static contact allowed accumulated attrition thickness		Mm	3
Resistance of main circuit		μΩ	630A 1250A 1600-2000A 2500-3150A 4000A			≤50μΩ ≤45μΩ ≤35μΩ ≤25μΩ ≤20Μω
Energy storage electrical stable power		W	70(40KA 100W)
Energy storage time		S	＜10

Technical Data - switch opening and closing coils

	Switch opening coil	Switch closing coil	Note
Rated operation voltage(V)	DC220, DC110；AC220, AC110	DC220, DC110；AC220, AC110	Do not open the switch if the Switch opening coil is smaller than 30% stable operation voltage
Coil power(W)	245	245
Normal work voltage range	65%~120%rated voltage	85%~110% rated voltage

Contour & Installation Dimensions

Note: These parameters are from ZN63A-12/□-40KA
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