ZW32Y-12 Outdoor Vacuum Circuit Breaker

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ZW32Y-12 Outdoor Vacuum Circuit Breaker

ZW32Y-12/630-20/25 outdoor permanent magnetic MV vacuum on pillar dry circuit breaker (hereinafter referred to as circuit breaker), is the control and protection equipment used in rated voltage 12KV, 50HZ AC three phase high voltage distribution grid. Mainly used for load current, overload current and short-circuit current breaking, closing in the power lines. Applied to substation and industrial and mining enterprises in power system used for protection and control purposes.
Standard: IEC 62271-100

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Operating conditions

1. Ambient temperature: upper limit +40℃, lower limit -30℃;
2. Altitude: ≤2000m;
3. Wind pressure: not more than 700Pa (corresponding to the wind speed 34m/s);
4. Earthquake intensity: do not exceed 8 degree;
5. Pollution grade: III class;
6. Maximum daily temperature variety less than 25℃ .

Technical data

Item			Unit	Parameter
Rated voltage			kV	12
Rated insulation level	1min power frequency withstand voltage	Dry test Wet test	kV	42/ fracture 48
			kV	34
	Lightning impulse withstand voltage (peak)		kV	75/ fracture 85
Rated current			A	630, 1250
Rated short-circuit breaking current			kA	20
Rated short-circuit breaking current time			Times	30
Rated short-circuit closing current (peak)			kA	50
Rated peak withstand current			kA	50
Rated short-time withstand current			kA	20
Rated short circuit duration			S	4
Opening time			ms	＜50
Closing time			ms	＜60
Full off time			ms	≤100
Arcing time			ms	≤50
Mechanical life			Times	30000
Switch on power			J	70
Rated operational voltage and auxiliary circuits rated voltage			V	DC 220
			V	AC 220