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Handcart Indoor High Voltage 12KV Switchgear Circuit Breaker

Handcart Indoor High Voltage 12KV Switchgear Circuit Breaker

12KV switchgear circuit breaker

High Voltage switchgear circuit breaker

Indoor switchgear circuit

Place of Origin:

Zhejiang, China

Brand Name:




Model Number:


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Product Details
Product Name:
High Voltage Vacuum Circuit Breaker
Rated Current:
Rated Voltage:
Mechanical Life:
10000 Times
Rated Frequency:
50/60 Hz
Payment & Shipping Terms
Minimum Order Quantity
1 set
$630.00 - $1,500.00/pieces
Packaging Details
plywood Carton
Delivery Time
5-10 days
Payment Terms
L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability
10000 Unit/Units per Month
Product Description

VCB-12 handcart indoor high voltage vacuum circuit breaker switchgear 12KV VCB



VCB(R)-12 hand-cart type indoor vacuum load switch (fuse combination electric appliance) is an indoor unit developed by our company with three-phase AC 50Hz and rated voltage of 12kV. This product is the main component of the ring network power supply unit, widely used in industrial and mining enterprises, residential communities, hospitals, schools, parks, secondary substations and other power distribution systems, is the best choice for the protection station. This product complies with the relevant provisions of the standard GB3804 "3.6KV ~ 40.5KV high voltage AC load switch", GB16926 "AC high voltage load switch fuse combination".


Performance characteristics:

1.VEF(R)-12 is small in size and compact in structure.

2.VEF(R)-12 has stable and reliable performance, long electrical life, strong closing and breaking ability, safe and convenient operation and maintenance.

3.VEF(R)-12 vacuum source chamber is assembled in the insulation tube with our unique process, which makes the switch have the advantages of less maintenance, no pollution, no explosion hazard, low noise and high insulation level. It is suitable for frequent operations and other harsh conditions. Working conditions.

4. The self-developed integral modular spring operating mechanism is equipped with a complete five-proof chain function.

5. The unique and novel design of the combined electric appliance makes the three-phase fuses flat on the upper side of the load switch, and the device is reasonably convenient for maintenance.

6. Load switch and its combination can be used with VS1, VD4, ZN63A and other products in KYN44, GZS1, KYN28 and other centrally-disconnected switchgear, providing designers with more optimized options and configurations.

7. The VEF (R)-12 handcart vacuum circuit breaker and its combination can be operated manually or electrically.

8. When the combination of electrical equipment breaks, there is a fuse hitting the operation machine. The shunt release operation is operated in two ways: 1- When the overload current is interrupted, the relay protection action command shunt release tripping vacuum load switch; 2- When the short circuit is blown, the fuse is blown off and then the mechanical trip system completes the opening. The fuse is only used as backup short circuit protection, which greatly reduces the running cost.

9.VEF(R)-12 vacuum load switch-fuse combination electric appliance can most effectively protect the transformer.

The main technical parameters:

NO Item Units Technical parameters
1 Rated voltage KV 12
2 Rated frequency Hz 50



Rated insulation level


Lightning impulse withstand voltage



1min power frequency withstand voltage 42













Load switch



Rated current A 630
Rated active load breaking current A 630
Rated closed-loop breaking current A 630
Rated current charging breaking current A 10
4s rated short-time withstand current kA 20
Rated peak withstand current kA 50
Rated short circuit closing current kA 50
Rated ground fault breaking current A 5
Rated cable charging and line charging breaking current under ground fault conditions A 17.3
Mechanical life   M2
Electrical life   E2






Load switch-fuse combination Fuse maximum rated current A 125
Rated transfer current A 3050A
Melting tube trigger switch opening time ms 35
Rated short-circuit breaking current kA 31.5
Rated short circuit closing current kA 80
Fuse impact output energy J 2-5
6 Contact switch mm 8.5±1
7 Contact overtravel 0.5
8 Center distance between poles 210±1
9 Allow contact wear thickness 3
10 Average opening speed m/s 1.2±0.2
11 Average closing speed 0.6±0.2
12 Contact closing bounce time ms 3
13 Three-phase split and close non-interval 2
14 Opening time ms 20~50



Main loop resistance



Load switch ≤70
Combination electric appliance ≤350
16 Operating mechanism operating characteristics




85%~110% rated voltage Reliable closing
65%~120% rated voltage Reliable closing
30% rated voltage No scoring gate


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