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Purana Electric Co., Ltd.
Purana Electric Co., Ltd.  

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You are here: home  > Indoor Vacuum Circuit Breaker  > Medium Voltage and High Voltage Vacuum Circuit Breaker (VCB)

Medium Voltage and High Voltage Vacuum Circuit Breaker (VCB) 

Payment Terms: T/T,L/C,WU 
Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: VN3-12E
Production Capacity: 1000 per month
Delivery Date: 20 working days
Poles Number: 3
Rated Voltage: 12kV
Rated Short Circuit Breaking Current: 20/25/31.5kA
Means of Transport: Ocean,Land,Air
Packing: In wooden cases
Type: Vacuum
Brand Name: PURANA
Rated Current: 630-3150A
Rated Peak Withstand Current: 50/63/80kA

This indoor medium-voltage AC vacuum circuit breaker is a newest product which is applicable to 3-phases , 12kV indoor switch system.

VN3-12E indoor medium-voltage AC vacuum circuit breaker is a newest product designed by our company which is applicable to 3-phases AC50Hz, 12kV indoor switch systems. The product is with characteristics of smaller volume, reliable insulation, no pollution, long time free maintenance and so on. It is produced with standardized circuit breaker assembly line and has good performance and perfect quality.


1. Equipped with modularized operating mechanism which make the maintenance and the replacing are more convenient. The replace of module do not affect the dynamic capability and also shorten the power-off duration.

2. The interrupter and primary circuit are sealed in the epoxy resin, which make the circuit breaker is more reliable.

3. The pole using converted and ventilated technique and lower resistance vacuum circuit breaker limit the temperature rising because of circuit breaker working for a long time and also reduce the power loss.

4. The operating mechanism is designed uniquely and avoid the moving contact over-rebounding when the circuit breaker is opened and prolong the vacuum interrupter mechanical life.

5. Past the type test according to the national standards, such as GB, DL, international standards of IEC, CEI, DIN, VDE and other major industrialized countries.

Main Technical Parameters of 12kV Vacuum Circuit Breaker
Rated Voltage
Rated VoltageUr[kV]12
1min power frequency withstand voltage(effective value)Ud(1min)[kV]Between phase
or phase to the earth
Lightning impulse withstand voltage(peak value)Up[kV]7585
1min power frequency voltage of the secondary controlling circuit[V]2000
Power supply of controlling circuit[V]AC220, DC220/110
Rated frequencyFr[Hz]50/60
Rated operating sequence
20kA~31.5kA: O-0.3s-CO-180s-CO
40kA~50kA: O-180s-CO-180s-CO
Rated Current
Rated currentIr[A]630, 1250, 1600, 2000, 2500, 3150, 4000
Rated short-circuit breaking currentIcs[kA]20, 25, 31.5, 40, 50
Rated short-circuit making currentIu[kA]50, 63, 80, 100, 125
Rated short-time withstand currentIk[kA]20, 25, 31.5, 40, 50
Rated peaking withstand currentIp[kA]50, 63, 80, 100, 125
Rated capacitor bank breaking current[A]400
Rated capacitor bank making current[kA](4250Hz)20
Mechanical character
Mechanical lifetimeCycle30000/20000
Electrical lifetime
Opening time[ms]20~50
Arcing time[ms]10~15
Full breaking time[ms]30~65
Closing time[ms]35~70

Frame of indoor withdrawable vacuum circuit breaker:

Indoor withdrawable vacuum circuit breaker production scenes:

Ms. Sharon
skype Ms. Sharon
Tel: 86-574-63037416
Fax: 86-574-63022858
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Company Info

Purana Electric Co., Ltd. [China (Mainland)]

Business Type:Manufacturer, Distributor/Wholesaler
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)

Purana-Sharon:   skype

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