Overview:
VTG-24 indoor high voltage AC vacuum circuit breaker (hereinafter referred to circuit breaker) is used in the three-phase AC 50Hz indoor place with the rated voltage 24kV as the protection and control of the electrical facilities in the industrial mines, enterprises, power plant, and power substation, especially suitable for metallurgy, chemical, and coal industries.
Circuit breaker complies with the GB/T 1984 High Voltage AC Circuit Breaker, GB/T 11022 Common specifications for high-voltage switchgear and controlgear standards, DL/T 402 High Voltage AC Circuit Breaker, and related IEC standards.
The operating mechanism of circuit breaker is of the integrated design type. The operating mechanism and the primary circuit are front and back arranged, and they can be used as fixed installation unit (fixed cabinet) and also form a cart unit (cart cabinet) together with the propulsion mechanism (chassis truck).
2.Technical Parameters:
2.1  Main technical parameters of circuit breaker

2.2  Mechanical characteristics parameters of circuit breaker

2.3 Technical data of energy storage motor
This product has a permanent magnet single-phase DC motor equipped with a special reducer. The technical parameters of the motor are listed in table below.

3.Operating Conditions:
3.1 Normal Working Conditions
3.1.1 Ambient temperature: The max. temperature is +40℃, and the min. temperature is -15℃ (storage and transport at -30℃ are allowed);
3.1.2 Environmental humidity: The daily mean relative humidity is ≤ 95%, the monthly mean relative
humidity is ≤ 90%; the daily mean vapor pressure is ≤ 2.2 x 10 – 3MPa, and the monthly mean vapor pressure is ≤ 1.8 x 10 – 3 MPa;
3.1.3 The altitude does not exceed 1000m (customization is required if greater than 1000m);
3.1.4 The earthquake intensity does not exceed 8 degrees;
3.1.5 There is no water drops, no flammable materials, no chemical corrosive gas and no severe vibration at the site.
3.2 If the normal working conditions are not met, please contact the manufacturing unit.
4.Features:
4.1  Excellent overall performance of circuit breaker
4.1.1 The arc extinguish chamber and operating mechanism of circuit breaker are configured at front and rear, and are connected as a whole structure through the transmission mechanism;
4.1.2 The mechanical life is up to 10,000 times and above.
4.2  The advanced vacuum arc extinguish chamber uses copper-chromium alloy contact and longitudinal magnetic field contact structure
4.3  Integrally cast solid-sealed poles
4.3.1 The solid-sealed pole is formed with new APG process;
4.3.2 The vacuum arc extinguish chamber is solid-sealed in the pole to effectively prevent damage and surface contamination due to other objects, and to significantly reduce the overall size of circuit breaker.
4.4  Flexible and simple operating mechanism
4.4.1 The operating mechanism is of the spring energy storage type with electric and manual energy storage functions;
4.4.2 During the operation of circuit breaker, the energy of the energy storage spring is transferred to the link gear through output cam, and then to the moving contact part through the link gear;
4.4.3 With advanced and reasonable damping device, the opening rebound force is small.
4.4.4 No adjustment is required with very little maintenance.
5.Outline and Installation Dimensions:
5.1  Outline and installation dimensions of handcart-type circuit breaker

Note: The stroke of the handcart is 300±2mm.

5.2  Outline and installation dimensions of handcart-type circuit breaker

Note: The stroke of the handcart is 300mm.

5.3  Outline and installation dimensions of fixed circuit breaker

5.4  Outline and installation dimensions of fixed circuit breaker

Note: Forced air-cooled is required for 4000A.

6.Electrical Schematic Diagram:
6.1 Secondary Schematic Diagram for Fixed Type

6.2  Secondary Schematic Diagram for Handcart Type