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  • vsg operating mechanism-single spring
  • vsg single spring 2
  • vsg single spring 3
  • vsg single spring 4
vsg operating mechanism-single spring
vsg single spring 2
vsg single spring 3
vsg single spring 4

VSG Integrated Unit Spring Operating Mechanism for VCB 12KV/24KV

Model: VSG-12


The operating mechanism is an important part of the high-voltage circuit breaker. This VSG spring operating mechanism is used for VSG series vacuum circuit breaker, suitable for 3 phase AC,50 Hz, and rated voltage of 12kV, and applied in places with breaking of different load and frequent operations as protection and control unit, such as industrial and mining enterprise, power plants and transformer substations.
  • General Description
  • Features
  • Technical parameter
  • Working conditions
  • Drawing

The VSG mechanism uses a cam (in the core module of the mechanism) to drive the spindle directly (in the frame spindle module) to reduce the transmission link and improve the transmission efficiency (no hinge connection). Reduce the energy input of the product and increase the service life of the product. Install the main circuit module, that is, complete the basic configuration of the vacuum circuit breaker. Then install the chassis car module, the contact arm, the contact, and the insulating sleeve to complete the configuration of the hand-cranked circuit breaker.

1.The modular spring operating mechanism is convenience in the manufacture and maintenance.

2.The key parts of the operating mechanism are made of superior quality alloy and the operating mechanism grips are made of the high quality cold rolled sheet with a high structural strength.

3.The component surface adopt the cathode electrophoretic painting with a perfect corrosion resistance.

4.The linear-motion closing spring design minimizes the effect of spring self-vibration on the fatigue strength and it is useful to improve the product stability.

5.Both AC and DC power operaion and control are available and it is convenience for different users.

Item Unit Data
Rated voltage kV 12
Rated insulation voltage 1 min power frequency withstand voltage kV 65
Lightning impulse withstand voltage(peak) kV 75
Rated frequency Hz 50/60
Rated current A 630, 1250, 1600, 2000, 2500, 3150
Rated short-time withstand current kV 20, 25, 31.5
Rate peak withstand current 50, 63, 80
Rate short-circuit duration S 4
a.c. component of rate short-circuit breaking current kA 42
Rated short-circuit making current kA 50, 63, 80, 100
Mechanical life time 10000
Permitted abrasion thickness of moving and fixed contacts mm 3
Arcing time ms ≤15

1. Altitude not exceeding 2000m;
2. Ambient temperature: -15°c ~+40°c;
3. Relative humidity: monthly average not exceeding 95%, daily relative humidity not exceeding 95%;
4. Earthquake level not exceeding 8 class;
5. Without peril of fire, corrosion gas, explosion, vibration.

VSG-12 drawing

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