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ZW20-12 Series
Outdoor High-voltage Demarcation Vacuum Circuit Breaker

ZW20-12 Series Outdoor High-voltage Demarcation Vacuum Circuit Breaker


ZW20-12 Series Outdoor AC High Voltage Demarcation Vacuum Circuit Breaker (HDVCB) is an outdoor power distribution equipment with a rated voltage of three-phase 12kVAC/50Hz, which is mainly used to open and close the load current, overload current and short-circuit current in the power system. This circuit breaker adopts a mature box-type sealing structure and is filled with SF6 gas as an insulating medium, which has the advantages of good sealing performance, not affected by the external environment, and maintenance-free. ZW20-12 Series circuit breaker can meet the requirements of the electrical automation system if working together with the controller, and can reliably and effectively complete the traditional recloser function. The spring operating mechanism of this circuit breaker adopts a direct-acting chain main drive and a multi-stage tripping system, and its action performance is safe and reliable. ZW20-12 series vacuum circuit breakers are widely used in the protection and control of power distribution systems in substations or in industrial and mining enterprises, and are especially suitable for places with frequent operations and urban & rural automated power distribution networks.

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Basic Parameters

Rated voltage: 12KV

Rated frequency: 50Hz

Rated normal current: 630A; 1250A

Rated short-circuit breaking current: 20KA; 25KA; 31.5KA

Rated making current (peak): 50KA

Rated dynamic stability current (peak): 50KA

Rated thermal stability current (in 4 sec.): 20KA

Rated operating sequence: O-0.3s-CO-180s-CO

Rated energy storage motor voltage: 220VAC

Max/Min energy storage motor voltage: 242VAC; 187VAC

Rated operating voltage (closing): 220VAC

Max/Min operating voltage (closing): 264VAC; 143VAC

Rated operating voltage (opening): 220VAC

Max/Min operating voltage (opening): 264VAC; 143VAC

Different period of closing: ≤2ms

Different period of opening: ≤2ms

Rated SF6 gas pressure, gauge @ 20 ℃ : 0.6Mpa

Rated short-circuit current breaking times: ≥30 Times

Mechanical lifetime: 10000 Times

Application Environment

Ambient temperature: -30℃~+40℃

Altitude: ≤2000m

Wind pressure: ≤700Pa (that is, wind speed ≤34m/s)

Air pollution level: Level Ⅲ

The surrounding air is allowed to be polluted by dust, smoke, corrosive gas, steam or salt spray.

No frequent severe vibration.

* If you need to customize according to your special needs, please contact us.

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