ZW8-12G/630-20 Outdoor High Voltage Vacuum Circuit Breaker-Shanghai Gaosuo Electrical Co., Ltd.

Product Details

ZW8-12G/630-20 Outdoor High Voltage Vacuum Circuit Breaker

Overview

ZW8-12G/630-20 outdoor high voltage vacuum circuit breaker is a three-phase AC 50Hz outdoor high voltage switchgear, mainly used in 12kV rural and urban power systems for making and breaking load current, overcurrent and short-circuit current, and can also be used in other similar applications.

Main Technical Parameters

1. Circuit Breaker Main Technical Parameters

No.	Item		Unit	Data
1	Rated Voltage		kV	12
2	Rated Current		A	630
3	Power Frequency Withstand Voltage (1min)		kV	42
4	Lightning Impulse Withstand Voltage (Peak)		kV	75
5	Rated Short-circuit Breaking Current		kA	12.5, 16, 20
6	Rated Short-circuit Making Current (Peak)		kA	31.5, 40, 50
7	Rated Peak Withstand Current		kA	31.5, 40, 50
8	4S Short-time Withstand Current		kA	12.5, 16, 20
9	Rated Operating Sequence			Open-0.3S-Close-Open-180S-Close-Open
10	Rated Short-circuit Current Breaking Times		times	30
11	Mechanical Life		times	10000
12	Charging Motor Rated Voltage		V	DC or AC220, 110
13	Rated Operating Voltage (with dedicated spring operating mechanism)	Opening Coil	V	DC or AC220, DC110
13		Closing Coil	V	DC or AC220, DC110
14	Overcurrent Release Rated Current		A	5
15	Allowable Wear Thickness of Fixed and Moving Contacts		mm	3
16	Weight		kg	230

2. Technical Parameters After Circuit Breaker Adjustment

No.	Item		Unit	Data
1	Contact Gap		mm	11±1
2	Contact Overtravel		mm	3±0.5
3	Average Opening Speed		m/s	1.2±0.2
4	Average Closing Speed		m/s	0.9±0.2
5	Closing Bounce Time		ms	≤2
6	Three-phase Opening Non-synchronism		ms	≤2
7	Closing Time (with spring operating mechanism electric closing)		s	0.03-0.5
8	Opening Time (with spring operating mechanism electric opening)	At rated operating voltage	s	0.03-0.5
8		At low operating voltage	s	0.05-0.07
9	DC Resistance of Each Phase Circuit		μΩ	≤180
10	Phase Center Distance (inside box)		mm	175±2

3. Isolating Switch Technical Parameters

No.	Item	Unit	Data
1	Rated Voltage	kV	12
2	Rated Current	A	630
3	4S Rated Short-time Withstand Current (RMS)	kA	20
4	Rated Peak Withstand Current	kA	50
5	1.2/50μS Full-wave Impulse Voltage (Peak)	kV	To earth: 75, Across isolating gap: 85
6	1min Power Frequency Withstand Voltage (RMS)	kV	To earth: 42, Across isolating gap: 48
7	DC Resistance of Each Phase Conductive Circuit	μΩ	≤60
8	Spring Positive Pressure	N	440±44
9	Opening Manual Operating Torque	Nm	≤150
10	Blade Just-closed Position Deviation	mm	≤2

Outline Installation Dimensions

ZW8-12G/630-20 Outdoor High Voltage Vacuum Circuit Breaker | 12kV Rural and Urban Distribution Protection Equipment

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