|Place of Origin:||China|
|Certification:||CE, ISO, CCC|
|Minimum Order Quantity:||1 set|
|Packaging Details:||Plywooden package|
|Delivery Time:||20 days|
|Payment Terms:||L/C, T/T|
|Supply Ability:||100 sets per month|
|Model:||ZN28G-12||Breaking Capacity:||20, 25, 31.5, 40, 50KA|
|Rated Voltage:||12KV||Rated Current:||630A, 1250A,1600A, 2000A, 2500A, 3150A,4000A|
|Mechanical Life:||10000 Times||Motor Voltage:||DC/AC 110V 220V|
|Mechanism:||Spring Energy Charging||Warranty:||1 Year|
Upto 4000A Vacuum Circuit Breaker,
50KA Vacuum Circuit Breaker,
high rupture ability Circuit Breaker
ZN28G-12 indoor AC high-voltage vacuum circuit breaker is an indoor switching equipment with three-phase AC 50HZ and rated voltage 12KV.
Features of 12KV vacuum circuit breaker:
1. Simple structure, small size and the operating mechanism is the spring energy storage type.
2. It can be operated by AC power or DC power supply.
3. Compound insulated complted structure, small size, low noise and easy installation.
4. Ceramic and glass arc-chutes, with high vacuum insulating performance and special design, high rupture ability, long endurance and no explosive danger.
5. According to different customers' requirements, suitable for all kinds of switchgear.
|Rated impulse withstand voltage||75|
|Rated short-time power frequency withstand voltage (1min)||42|
|Rated short-circuit breaking current||KA||20||25||31.5||40|
|1600 2000 2500 3150 4000|
|Rated short-time withstand current||KA||20||25||31.5||40|
|Rated peak tolerable current||50||63||80||100|
|Rated short-circuit making current (peak value)||50||63||80||100|
|Secondary circuit power frequency withstand voltage (1min)||V||2000|
|Rated operation sequence||
O－180S－CO－180S－CO (at 40KA)
|Rated duration of short circuit current||S||4|
Rated single/back-to-back capacitance bank breaking current
Set breaking current
|Rated short-circuit breaking current DC flow percentage||≤35%|
|Average closing speed||m/s||0.6±0.2|
|Average opening speed||m/s||1.2±0.3|
|Rated short-circuit breaking current breaking times||times||30|
|Allowable wear accumulate thickness of moving and static contacts||mm||3|
|Rated closing operating voltage||v||AC110/220 DC110/220|
|Rated opening operating voltage||v||AC110/220 DC110/220|
|Rated voltage of energy storage motor||v||AC110/220 DC110/220|
|Contact opening distance||mm||11±1|
|Contact bounce time||ms||≤2|
Three - phase opening and closing
|Opening contact rebound amplitude||ms||≤3|
|Main circuit resistance||Ω||≤40 (≤25 at 40KA)|
Contact Person: Mrs. Mary Ji