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GB 311.1 12KV HV Indoor Vacuum Circuit Breaker

GB 311.1 12KV HV Indoor Vacuum Circuit Breaker

  • GB 311.1 12KV HV Indoor Vacuum Circuit Breaker
  • GB 311.1 12KV HV Indoor Vacuum Circuit Breaker
  • GB 311.1 12KV HV Indoor Vacuum Circuit Breaker
GB 311.1 12KV HV Indoor Vacuum Circuit Breaker
Product Details:
Place of Origin: Ningbo,China
Brand Name: Suntech
Certification: ISO
Model Number: ZN63(VS1)-12
Payment & Shipping Terms:
Minimum Order Quantity: 1 PCS
Price: Get the lastest price
Packaging Details: Exported Wooden Boxes
Delivery Time: 30-35 days after Payment
Payment Terms: L/C , T/T, Western Union, MoneyGram
Supply Ability: 10000 pcs per month
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Detailed Product Description
Type: Vacuum Circuit Breaker Poles Number: 3
Ambient Temperature: -40°C-+40°C Altitude: ≤1000m
Material: Stainless Steel Or Hot-dip Galvanized Steel. Rated Frequency: 50/60HZ
High Light:

12KV Vacuum Circuit Breaker


GB 311.1 Vacuum Circuit Breaker


12KV HV Circuit Breaker

VS1 type 12KV High Voltage Indoor Vacuum Circuit Breaker


ZN63(VS1) indoor high-voltage alternatigcurrent vacuum circuit breaker has a frequency of 50Hz and a rated voltage of 12kV. It applies to the electrical equipment control and protection in industrial and mining enterprises, power plants and substations, particularty to the places needing frequent operation. It can be fixed in a switch cabinet or istalldl on a handcart.

With stable performance and convenient istallation, it is the best choice for the control and protection of high-voltage power transmission and distribution systems.


Overall dimension of VF(R)-12(wheeled) indoor high-voltage alternating-current vacuum circuit breaker

GB 311.1 12KV HV Indoor Vacuum Circuit Breaker 0

The actuator employs spring energy storage which can be done electrically or manually. When the circuit breaker is operating, the energy generated by the energy storage spring is transferred to the connecting rod mechanism through an output cam and then to the movable contact through the connecting rod mechanism. The advanced and appropriate buffer avoids bounces in breaking and reduces the impact and vibration in breaking. The actuator almost needs no maintenance or adjustment. It can operate for up to 10000 times.


Overall dimension of VS1-24(wheeled) embedded indoor high-voltage alternating-current vacum circuit breaker

GB 311.1 12KV HV Indoor Vacuum Circuit Breaker 1

Overall dimension of VS1-12(fixed) indoor high-voltage alternating-current vacuum circuit breaker(large-current)

GB 311.1 12KV HV Indoor Vacuum Circuit Breaker 2

ltem Unit Reference value
Rated voltage kV 12
Rated insulation level

Lightning impulse

withstand voltage

kV 145
1min power-frequency withstand voltage kV 65
Rated frequency Hz 50/60
Rated current A 630/1250/1600/2000/2500/3150
Rated short-circuit breaking current KA 20/25/31.5
Rated short-circuit making current (peak value) KA 50,63,80
Rated short-time withstand current KA 20/25/31.5/40
Rated withstand current (peak value) KA 50,63,80
Required operation sequence   O-0.3s-CO-180s-CO
Rated short-circuit duration S 4
Times of making-breaking with the rated short-circuit current Times 30
Mechanical life   M2 level
Weight kg 150


1.The fuse can cut off a large short-circuit current in less than 10 ms and its breaking current can be up to 50KA. Thus, it can protect the transformer most efectively.

2.In terms of match between the transformer and the fuse (Table 1), the potential surge current of the fuse must be considered. Thus, fusing current of the fuse must be 1.6 times of the rated value; designer must consider possible fluctuations of other parameters of the grid and reserve margins for them. If a fuse is selected for high-voltage motor protection, designer must consider frequency of start of the high-voltage motor because frequent starts of the high-voltage motor will result in the fuse's failure when timely cooling is not available.


Primary voltage of

the transformer


Capacity of

the transformer


Model of the fuse

Rated current

of the fuse


Model for the

domestic market

Model for

international market

6.6 200 XRNT-10 12kV BDGHC 31.5
250 40
300/315 50
400 12kV BDGHC 63
500 80
630 90



1. IEC 62271-100 High-voltage alternating-current circuit-breakers

2. GB/T 11022-2011 Common specifications for high-voltage switchgear and controlgear standards

3. GB 1984 High-voltage alternating-current circuit-breakers

4. GB 311.1 Insulation co-ordination for high voltage transmission and distribution equipment


Operating conditions

1. Ambient temperature: - 40℃-+40℃ (below 35℃ within 24 hours)

2. Relative humidity:≤95% (daily average) or≤90% (monthly average)

3. Altitude: ≤1000m

Contact Details
Ningbo Suntech Power Machinery Tools Co.,Ltd.

Contact Person: Peter

Tel: 86-13958364836

Send your inquiry directly to us
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