Home >  Products > Power Transmission & Distribution Equipments > Load Break Switch > FZN21-12D/T630-20 Type & FZRN21-12D/T125-31.5 Type Indoor High-Voltage Vacuum Load Switch and Combination Switchgear

FZN21-12D/T630-20 Type & FZRN21-12D/T125-31.5 Type Indoor High-Voltage Vacuum Load Switch and Combination Switchgear


  • General
    FZ (R) N21-12D indoor high-voltage vacuum load switch and composite apparatus, used for circuit AC 50Hz, rated voltage 12kV, plays power distribution, control and protection of electrical equipment function. It can replace the expensive circuit breaker in a certain range, thus saving the power grid investment costs. The combination of electrical appliances can be widely used in the ring network power supply system in urban and rural areas. Under normal operation condition, it can close, bearing and breaking rated current, also can break the specified short-circuit current under abnormal conditions, especially suitable for the control and distribution and protection of transformer.


    The use of environmental conditions
    1.Altitude: no more than 1000m;
    2.The environment temperature: upper limit +40℃, lower limit -30℃;
    3.Relative humidity: daily average value is not greater than 95%, monthly average is not greater than 90%;
    4.Saturated steam pressure: daily average value is not higher than 2.2×10 Mpa, -3monthly average is not higher than 1.8×10 Mpa;
    5.No severe vibration, no corrosive gas, no fire, no explosion danger place.


    Models and implications of product











  • Main technical parameters

  • Outline and mounting dimensions







    1. Cabinet bracket 2. Disconnector 3. Fuse 4. Insulated tension pole
    5. Upper bracket 6. Vacuum interrupter 7. Static contact 8. Insulator
    9. Grounding knife 10. Grounding knife spring 11. Opening spring
    12. The tripping driving device 13. Insulated tension pole 14. Main axle
    15. Layshaft 16. Adjusting yoke 17. Spring operating mechanism