VS1-12 Indoor Vacuum Circuit Breaker

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Description

The VS1-12 Indoor Vacuum Circuit Breaker is a state-of-the-art medium voltage switchgear designed for reliable performance in indoor electrical systems. Operating at a rated voltage of 12kV with a frequency of 50Hz/60Hz, this innovative circuit breaker integrates advanced technology derived from the expertise of ABB Corporation in Switzerland and is further developed in China. Adhering to the stringent standards of GB1984 and IEC62271-100, the VS1-12 is engineered to meet the demands of modern electrical installations.

This vacuum circuit breaker is commonly mounted in switchgear panels such as KYN28 and XGN. It is particularly suited for applications requiring frequent operation, thanks to its high-speed recloser capability and reliable mechanical interlock. Available in both fixed and withdrawable types, the VS1-12 provides flexibility and convenience in various operational environments.

Constructed with composite insulated materials, the VS1-12 boasts a high level of insulation without pollution or explosion risk, ensuring safety and reliability in electrical operations.

Specifications

Item Unit Data
Rated voltage kV 10
Maximum working voltage kV 12
Rated current A 630, 1250, 1600, 2000
Rated short circuit breaking current kA 20, 25, 31.5
Rated short circuit making current (peak) kA 50, 63, 80
Rated withstand current (peak) kA 50, 63, 80
Rated short-duration withstand current (4s) kA 20, 25, 31.5
Rated insulation level KV 42 (fracture 48), 75 (fracture 85)
Mechanical life Times Spring Operation 10,000; Permanent Magnetic 30,000
Rated operating voltage of closing coils (DC/AC) V 110, 220
Rated operating voltage of opening coils (DC/AC) V 110, 220
Main circuit resistance of each phase μΩ 630≤50; 1250≤40
Permissible wearing accumulated depth for movable and fixed contact mm 3

Additional Information

  • Clearance between open contacts: 11±1 mm
  • Contacting travel: 4±0.5 mm
  • Opening time: ≤ 0.05 s (under maximum operating voltage), ≤ 0.08 s (under minimum operating voltage)
  • Closing time: ≤ 0.1 s
  • Average opening speed: 0.9 ~ 1.2 m/s
  • Average closing speed: 0.5 ~ 0.8 m/s

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