Operating Conditions
a. Ambient Air Temperature: Upper limit +40℃, lower limit -40℃
b. Altitude: ≤1000m (If the altitude needs to be increased, the rated insulation level shall be raised accordingly)
c. Wind Pressure: Not exceeding 700Pa (equivalent to a wind speed of 34m/s);
d. Seismic Intensity: Not exceeding Grade 8 (Chinese seismic intensity scale);
e. Pollution Degree: Class Ⅲ;
f. Daily Temperature Difference: Not exceeding 25℃
Main Technical Parameters

Item		Unit	zw32-12/T400-12.5	zw32-12/T630-16	zw32-12/T630-20
Rated Voltage		KV	12
Rated Current		A	400	630	630
Rated Short-Circuit Breaking Current		KA	12.5	16	20
Rated Short-Circuit Making Current (Peak Value)			31.5	40	50
Rated Peak Withstand Current			31.5	40	50
Rated Short-Circuit Withstand Current			12.5	16	20
Rated Short-Circuit Duration		s	4
Rated Insulation Level	Lightning Impulse Withstand Voltage (Peak Value)	kv	Phase-to-Phase, Phase-to-Ground: 75; Fracture: 85
	1-Minute Power Frequency Withstand Voltage		Phase-to-Phase, Phase-to-Ground: 42; Fracture: 85
Rated Operating Sequence			Open - 0.3s - Close-Open - 180s - Close-Open (Electric Operating Mechanism)
Rated Number of Short-Circuit Breaking Operations		Times	30
Mechanical Life			10000
Rated Operating Voltage (Opening/Closing Coils)		v	DC220、 110、、 AC220 110
Allowable Wear Thickness of Moving and Fixed Contacts		mm	3
Rated Current of Overcurrent Release		A	5
Current Ratio of Current Transformer			200/5 400/5 600/5
Contact Opening Distance		mm	9±1
Horn Contact Overstroke			2±0.5
Average Opening Speed		m/s	1.2±0.3
Average Closing Speed			0.6±0.2
Opening Time		ms	30-60
Closing Time			20-40
Closing Bounce Time			≤２
Three-Phase Opening/Closing Synchronism			≤２
DC Resistance per Static Circuit		μΩ	≤80
Energy Storage Motor	Rated Voltage	v	-220
	Rated Power	w	200
	Energy Storage Time	s	≤8
Weight		kg	85