Modular Operating Mechanisms VCB | VSG-12

Product Overview: VSG-12 Indoor High-Voltage Vacuum Circuit Breaker

Product Description: The VSG-12 indoor high-voltage vacuum circuit breaker is designed for use in indoor switchgear applications within 12kV power systems with a three-phase AC 50Hz rated voltage. It serves as a crucial protective and control unit for power distribution equipment and industrial facilities. This circuit breaker is suitable for environments that require frequent operations at the rated current or the capability to interrupt short-circuit currents multiple times.

The circuit breaker features a modular design, where the operating mechanism and the circuit breaker body are separable, allowing for quick replacements and assembly.


Modular Operating Mechanisms VCB is suitable for MV switchgear and is characterised by the modular design of the operating mechanism of this type of VCB

Operating Environment:

  • Ambient Temperature: Not exceeding +40°C, not less than -15°C (storage at -30°C is not allowed).
  • Altitude: Not exceeding 1000m.
  • Relative Humidity: Daily average not exceeding 95%, monthly average not exceeding 90%. Daily average saturation vapor pressure not exceeding 22×10-3MPa, monthly average not exceeding 18×10-3MPa.
  • Seismic Intensity: Not exceeding level 8.
  • Application Sites: Suitable for use in places without fire, explosions, severe pollution, chemical corrosion, and severe vibration.

Key Technical Parameters:

  • Rated Insulation Level: 75kV
  • Rated Lightning Impulse Withstand Voltage: 42kV
  • Rated Current: 630A, 1250A, 1600A, 2000A, 2500A, 3150A, 5000A
  • Rated Short-Circuit Breaking Current: 25kA, 31.5kA, 40kA
  • Rated Short-Circuit Making Current (Peak): 63kA, 80kA, 100kA
  • Rated Short-Circuit Duration: 4 seconds
  • Rated Operating Sequence: O-0.3s-CO-180s-CO or O-180s-CO-180s-CO (40kA)
  • Rated Single/Back-to-Back Capacitor Bank Breaking Current: 630A/400A
  • Number of Operations at Rated Short-Circuit Breaking Current: 30 times
  • Closing Time: 30-70ms
  • Opening Time: 20-50ms
  • Mechanical Life: 30,000 operations
  • Rated Energy Storage and Operating Voltage: AC220/110V, DC220/100V
  • Contact Gap: 11±1mm
  • Overtravel of Contact: 3.5±0.5mm
  • Average Closing Speed: 0.5-0.8m/s
  • Average Opening Speed: 0.9-1.2m/s
  • Contact Bounce Time at Closing: ≤2ms
  • Synchronization Time for Three-Phase Opening and Closing: ≤2ms
  • Main Circuit Resistance: ≤50μΩ (630A), ≤45μΩ (1250A), ≤35μΩ (1600-2000A), ≤25μΩ (2500A and above)

Product Features:

  • Wide Applicability: The Modular Operating Mechanisms VCB VSG-12 indoor high-voltage vacuum circuit breaker is suitable for a variety of environments and is particularly well-suited for applications requiring frequent operations and high reliability in power systems.
  • Modular Design: The operating mechanism uses a modular design, providing the convenience of quick replacements and assembly.
  • Safety and Reliability: It boasts outstanding electrical performance, reliably protecting and controlling power equipment.
  • Long Mechanical Life: With a high mechanical life, it can withstand extended periods of use.
  • Advanced Design: Features like contact gap and contact overtravel ensure high performance and reliability.

Modular Operating Mechanisms VCB | VSG-12插图1

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