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