Outdoor High Voltage Vacuum Circuit Breaker

Introduction - High Voltage Vacuum Circuit Breaker
ZW6-12/T630-20 Outdoor High Voltage Vacuum Circuit Breaker (hereinafter refers to circuit breaker) applies to AC 50Hz 10~12KV voltage three-phase power system for opening and closing the load current. The product has protection function for overload and short circuit as well as can automatically close the switch. Users can configure protector for delaying surging current and the isolate switch with avoiding the lightening function (that is the circuit breaker combined with the isolate switch. Hereinafter refers to “combined circuit breaker”), etc.
Working & Environmental Conditions - High Voltage Vacuum Circuit Breaker
1. Surrounding air temperature: -40°C~+55°C, daily temperature difference: 25°C
2. Altitude: less than 2000m
3. Wind pressure: smaller than 700Pa (equals to wind speed 35m/s)
4. No regular dramatic shake; Earthquake intensity is smaller than 8 degree
5. No strong corrosion gas or medium (such as acids, alkali and heavy smoke )
6. Anti-filthy rank: Ⅳ
Model Meaning
Main Technical Parameters - Vacuum Circuit Breaker
Table One

Order	Name			Unit	Parameter
1	Rated voltage			KV	12
2	Rated current			A	630
3	Rated frequency			Hz	50
4	Imin work frequency voltage tolerance	Dry test		KV	42/49
		Wet test			34
5	Lightening impact current tolerance (peak value) alternated, towards the ground/fracture			KV	75/85
6	Rated short circuit breaking current			KA	20
7	Rated short circuit closing current (peak value)			KA	50
8	Rated peak value current tolerance			KA	50
9	4S short term current tolerance			KA	20
10	Rated operation cycle				Open-0.3s-close-open-180s-close-open
11	Rated times short circuit breaking current			Times	30
12	Mechanical life span			Times	30000
13	Secondary circuit I min work frequency voltage tolerance			KV	2
14	Protection CT		Ratio	A	( )/5
			Capacity	VA	15
15	Weight			Kg	180

Table Two

Order	Name	Unit	Parameters
1	Contact openness size	Mm	11±1
2	Contact excess travel	Mm	3+1.0-0.3
3	Average Switch closing speed	M/s	0.65±0.15
4	Average Switch opening speed	M/s	1.1±0.2
5	Differences of three-phase Switch opening at the same period	Ms	≤2
6	Switch closing and bouncing time	Ms	≤2
7	Switch closing time	Ms	≤60
8	Switch opening time	Ms	≤70
9	DC resistance of each phase circuit	µΩ	≤200
10	Dynamic, static contacts allowed accumulated attrition thickness	Mm	3

Contour & Installation Dimensions

Picture 1 Contour & Installation Dimensions Diagram of ZW6-12/T Picture 2 Contour & Installation Dimensions Diagram of ZW6-12G/T

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