China Electrical Power Transformer manufacturer

Zw20-12 Series Outdoor High Voltage Vacuum Circuit Breaker (VCB)

Product Details:
Place of Origin: China
Model Number: Zw20-12
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: 500-30000
Packaging Details: wood pack
Delivery Time: 15 days
Payment Terms: LC T/T
Supply Ability: 20000 pieces/year
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Detail Information

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Product Description

ZW20A-12 Series Outdoor High Voltage Vacuum Circuit Breaker


The ZW20A-12 is an advanced version of the ZW20-12 column vacuum circuit breaker with a mature box seal. Filled with SF6 gas, it has a good sealing performance, so that it is not affected by the external environment. It is a maintenance free product. Its spring operating mechanism adopts direct chain active transmission and multi-stage tripping system, which has high reliability and is the best choice for the circuit breaker on the pillar.



No. Item Unit Data
1 Rated voltage kV 12
2 Rated frequency Hz 50
3 Rated current A 630,1250
4 Rated short circuit breaking current kA 12.5,16,20,25
5 Rated peak withstand current kA 31.5,40,50,63
6 Rated short time tolerance current(4s) kA 12.5,16,20,25
7 Rated short circuit opening and closing current kA 31.5,40,50,63
8 Institution life time 10000
9 Rated short open circuit current switch frequency time 30
10 Rated current open circuit frequency time 10000
  • Power frequency withstand voltage (1min) : phase, ground/fracture
kV 42/48
12 Lightning shock withstand pressure(peak)phase, ground/fracture kV 75/85
  • Power frequency withstand voltage of the secondary circuit)(1min)
kV 2
14 Net weight kg 140



About us


Qingdao Hengfengyou Electrical Engineering Co. , Ltd. is one of the large-scale electric complete

sets of manufacturers in China, specializing in oil-immersed transformers, dry-type transformers,

high-voltage Cabinets, low-voltage cabinets and substation manufacturing specialized electrical

enterprises. The company is located in the beautiful coastal city of china-qingdao. The company

has a registered capital of 10 million yuan, 20 senior technical personnel, more than 500 employees,

and a sound sales and service system, annual output value of US $1 billion, the products sell well

at home and abroad.


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