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Home > Products > Circuit Breaker > Outdoor Circuit Breaker Zw20 of Mingde Brand

Outdoor Circuit Breaker Zw20 of Mingde Brand

Basic Info

Model No.:  ZW20

Product Description



Model NO.: ZW20


Operation: Electric & Manual Circuit Breaker


Arc-extinguishing Medium: Vacuum


Structure: High and Medium Voltage Circuit Breaker


Type: Circuit Breaker


Certification: ISO9001-2000, CE


Rated Frequency: 50Hz Circuit Breaker


Mechanical Life: 10000 Times Circuit Breaker


Rated Short Circuit Breaking Times: 30 Times Circuit Breaker


Specification: CE, ISO9001 Circuit Breaker


HS Code: 8535210000




Breaking Capacity: Middle& High Voltage Circuit Breaker


Speed: Normal Type Circuit Breaker


Installation: Fixed


Poles Number: 3


Function: Overcurrent Protection


Rated Current: 630A Circuit Breaker


Rated Short-Circuit Making Current: 50ka Circuit Breaker


Rated Power of The Motor: 40W Circuit Breaker


Trademark: Mingde Circuit Breaker


Origin: Cixi, Ningbo. Zhejiang Circuit Breaker


Outdoor Circuit Breaker ZW20







Main technical data of the circuit breaker ZW20



No. Item Unit Numerical value
1 Rated voltage kV 12
2 Rated current A 630
3 Rated frequency Hz 50
4 Rated short-circuit breaking current kA 20
5 Rated peak withstand current kA 50
6 Rated short-time withstand current kA/S 20/4
7 Rated short-circuit making current (peak value) kA 50
8 Rated operating sequence O-0.3S-CO-180s-CO
9 Mechanical life times 10000
10 Rated short-circuit breaking times times 30
11 1 min frequency withstand (wet) between poles, to earth/ between open contacts kV 34
(dry) (wet) between poles, to earth/ between open contacts kV 42
12 Rated lightning impulse withstand current (peak value) between poles, to earth/between open contacts kV 85
13 Power frequency withstand voltage of secondary circuit (1 min) V 2000
14 SF6 gas pressure Mpa 0




Main technical features of the circuit breaker ZW20



No. Item Unit Numerical value
1 Clearance mm 9±1
2 Travel mm 3~4
3 Opening speed m/s 1.2±0.2
4 Closing speed m/s 0.6±0.2
5 Bounce time(contacts closing) m/s ≤2
6 Pole center distance mm 135(inside)/280(outside)
7 Three pole opening/closing non-synchronism ms ≤2
8 Each pole's conductance circuit resistance μΩ ≤150
9 Closing time ms 25~60
10 Opening time ms 20~50
11 Rated power of the motor W 40




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