Two grid power

Power Equipment Of Two Grids

ZW20-12 series outdoor high-voltage AC vacuum circuit breaker

Product overview:

ZW20-12 series outdoor high-voltage AC vacuum circuit breaker is a three-phase AC 50Hz outdoor high-voltage switchgear with rated voltage of 12kV. It is mainly used to break and close the load current, overload current and short circuit current of the power system. It is suitable for protection and control of substations, industrial and mining enterprises and urban and rural power distribution networks, especially for places with frequent operations and urban power distribution networks. This product is matched with the controller, which can meet the requirements of the power distribution automation system, and can reliably and effectively complete the traditional recloser function. It is a maintenance-free product with mature box type sealing structure and SF6 gas filled inside, which has good sealing performance and is not affected by the external environment. The spring operating mechanism adopts the direct chain main drive and multi-stage tripping system, which has high action reliability and is a good product of pole-mounted circuit breaker.

Product model description

Outdoor high-voltage AC vacuum circuit breaker

Design No.

Rated Voltage (kV)

Spring operating mechanism

Rated Current (A)

Rated short-circuit breaking current (kA)


Service environmental conditions​

● Ambient air temperature: - 30℃~+40℃;
● Altitude: no more than 2000m;
● The surrounding air should not be polluted by dust, smoke, corrosive gas, steam or salt mist; 
● The wind speed shall not exceed 34m/s (equivalent to 700Pa on the cylinder surface);
● No frequent violent vibration;
● Pollution grade: Grade III.

Outline and installation dimension drawing



Contact Information
Zhejiang Changzheng Electric Co., Ltd.
Address:No.159, Wei 16 Road, Yueqing EconomicDevelopment Zone, Yueqing City, Zhejiang Province
Service hotline:400-826-9123
website:www.changzheng.com.cn