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  •   12KV Gas Insulated Switchgear Circuit Breaker GIS Disconnector
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12KV Gas Insulated Switchgear Circuit Breaker GIS Disconnector

Model: 12KV-1250A


The VCB in the GIS cabinet is a high-voltage circuit breaker used to protect equipment and personnel in the power system from the effects of power system overload, short circuits, and ground faults. This device is suitable for power transmission and distribution systems ranging from 10 kV to 35 kV, and has the advantages of reliable short circuit protection, fast closing speed, and convenient operation. Its main components include mechanisms, electrical components, control circuits, etc. This device can be used alone or in conjunction with other electrical equipment, such as isolation switches.
  • General
  • Technical Parameter
  • YFG-12KV-1250A is a kind of disconnector, which is cheap and easy to install with its lttle maintenance, long life and small size. It complies with the technical requirements of GB1984- -89 and GB/T1984 -2003“ High-voltage alternating-current circuit- breakers" Major loop: 1250A-20KA (4s); 25KA (3s); Mechanical life: 5000 times. Ground loop: 20KA(2s); Mechanical life: 2000 times.

    Product definition

    Working condition precautions

    O Altitude ≤1000m, earthquake intensity≤8 degree. O Class of pollution: I. O Ambient temperature: -409 ~ +140°C ; Relative humidity daily average≤90% . monthly average≤90%. O Not applicable in the place with frequently violent vibrations, or water vapor, gas, chemically corrosive sediments, salt spray, dust and dirt, that would significantly affect the performance of the mechanism, or fire and explosion hozards.  



  • No. ltem Unit Data
    1 Rated frequency Hz 50
    2 Rated current A 1250
    3 Rated short time withstand current KA 20/25
    4 Rated peak withstand current KA 50
    5 Rated short circuit duration S 4
    6 Rated short circuit making current KA 50
    7 Rated operating sequence O-0.3s-180s-CO
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