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VGK-12 fixed type-upper+down

VGK-II-12 indoor fixed type electrical vacuum circuit breakers

Sku Number: VGK-II-12

Description

VGK-II-12 series indoor high voltage AC vacuum circuit breaker (vertical rotary isolation type) is an indoor switchgear for 12kV power system. It is used as protection and control unit for power grid equipment and industrial and mining enterprises. The nature of the load and frequent operation, multiple occasions of short-circuit current. The product adopts the new circuit breaker operating mechanism, the vacuum interrupter and the main conductive circuit parts are solidly sealed in one part to protect the arc extinguishing chamber from collision, dust and condensation. The environment adaptability is strong, the operation and maintenance cost is greatly reduced, and the product is realized once. Partially maintenance-free, the operating mechanism is less maintenance; the operating mechanism is integrated with the circuit breaker and the isolating switch.

Outstanding Features Make You Stand Out

We play extreme caution to quality and utmost attention to detail, which makes our products so perfect.

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    Modularization of Functional Unit

    The main circuit unit and running product are coherent in interchangeability.

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    Strong Versatility

    The operating mechanism can be separated from the whole circuit breaker for convenient and easy maintenance and fix.

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    Low Maintenance

    No need of adjustment of driving unit; long-acting lubricating, reliable corrosion resistance, and high mechanical stability make low maintenance possible.

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    Long-acting Lubricating

    We apply German lubricating grease boasting lower starting torsion, stronger anti-aging and oxidation resistance.

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    Strong Corrosion Resistance

    Utilizing zinc-nickel alloy plating line with a German process to make sure our corrosion resistance is 5 to 7 times stronger than ordinary zinc-plating process.

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    Strong Expandability

    This product can easily realize diverse arrangements and combinations to meet functions like expandability and control.

  • Product Detail
  • Technical Parameters
  • Technical Drawings

VGK-II-12 series indoor high voltage AC vacuum circuit breaker (vertical rotary isolation type) is an indoor switchgear for 12kV power system. It is used as protection and control unit for power grid equipment and industrial and mining enterprises. The nature of the load and frequent operation, multiple occasions of short-circuit current. The product adopts the new circuit breaker operating mechanism, the vacuum interrupter and the main conductive circuit parts are solidly sealed in one part to protect the arc extinguishing chamber from collision, dust and condensation. The environment adaptability is strong, the operation and maintenance cost is greatly reduced, and the product is realized once. Partially maintenance-free, the operating mechanism is less maintenance; the operating mechanism is integrated with the circuit breaker and the isolating switch.

The integrated design of the circuit breaker (load switch) and the isolating switch effectively reduces the cabinet space occupied by the functional unit;

The dual-function (isolation, switch) mechanism simplifies the mechanical interlock between the isolating switch and the circuit breaker (load switch) and the door of cabinet, greatly improving product reliability;

The operating mechanism of using coil and torsion spring has no zero death point and high reliability.

No. Parameters name Unit Parameters
Circuit breaker Load switch
1 Rated voltage kV 12
2 Rated current of main busbar A 630 1250
3 Rated frequency Hz 50
4 Rated short time withstand current Main circuit kA 25 31.5
Ground circuit 21.7 27.4
5 Rated short-time peak current Main circuit 63 80
Ground circuit 54.5 68.5
6 Rated short circuit withstand time Main circuit s 4
Ground circuit 2
7 Rated short circuit closing current (peak) kA 63 80
8 Rated short circuit breaking current 25 31.5
9 Rated short circuit breaking times Times 30
10 Rated operation sequence O-0.3s-CO-180s-CO
11 Mechanical life Circuit breaker (load switch) Times 10000
Three-position switch 5000
12 Rated insulation level 1min power frequency withstand voltage (effective value) Phase, to ground kV 42
Fracture 48
Lightning impulse withstand voltage (peak) Phase, to ground 75
Fracture 85
Power frequency withstand voltage of secondary circuit V 2000
13 Contact opening distance mm 9±1
14 Overtravel 3±0.5
15 Interphase center distance 210±1
16 Closing contact bounce time ms ≤2
17 Three phase asynchronous of opening ≤2
18 Opening time

When the operating voltage is

highest 17~55
rated
Minimum
19 Closing time ms 30~70
20 Average opening speed (first 6mm average) m/s 1.0~1.8
21 Average closing speed (after 6mm average) 0.8~1.4
22 Main conductive circuit’s resistance μΩ ≤100
23 Contact pressure N 3200±150
24 Opening contact’s rebound amplitude mm ≤2

VGK-12 fixed type-upper+down

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