ZN28-12(ZN28A-12) Indoor High Voltage Vacuum Circuit Interrupter

ZN28-12(ZN28A-12) Indoor High Voltage Vacuum Circuit Interrupter

ZN28-12(ZN28A-12) Indoor High Voltage Vacuum Circuit Interrupter

• Specification
• Paramters
• Drawing

• ZN28-12(ZN28A-12) Indoor High Voltage Vacuum Circuit Interrupter

  Summary

  ZN28-12 and ZN28A-12 indoor HV vacuum circuit breaker applies to power system of rated voltage 12kV, three-phase AC 50/60Hz. it used to control and protect electric apparatus in industry like mining, substation and so on. ZN28-12 is a unitary type (operation mechanism is installed inside the switchgear and combine with it as a whole); ZN28A-12 is a hanging-on type (the mechanism and switchgear are separately installed on cubicle or support frame, then connected with link rod and drive shaft.)
  As long as the VCB operates within the required mechanical parameter, it can work with many advantages such as strong breaking capability, effective arcextinction, long lifetime, reliable and safe operation as well as easy maintenance. The product conforms to IEC62271-100, GB/T1984, JB3855 and DL/T403.

  Ambient condition

  1. Altitude: ≤1000m;
  2. Ambient temperature: -25℃~+40℃;
  3. Relative humidity: daily average ≤95％, monthly average ≤90％;
  4. Earthquake intensity: ≤8 degree;
  5. It should work in occasions without flammable and explosive matter, without corrosive chemical and frequent severe vibration.

  Product feature

  1. The vacuum arcing chamber of this VCB is of middle sealed-in longitudinal magnetic field type. The main shaft, opening spring and buffer are all installed on the framework. There are 6 pieces of insulator switch fixed with stable and moving trestles , then the vacuum arcing chamber are installed between the stable and moving trestles. The main shaft connects with moving conducting bar of vacuum arcing chamber through crutch arm of insulating bar. Two pieces of insulation bars connect two ends of stable and moving trestles to form a whole so as to improve the rigidity.
  2. When the stable and moving contact open by the performance of operation mechanism, the arc in vacuum occur between contact, then extinct when the current reach at zero. Due to the special contact structure, during the arcing period, there is longitudinal magnetic field between contact so that arc lies evenly on the surface of contact and maintain a low arc voltage; in Vacuum arc-extinction chamber, the medium intensity recover at high speed, as well as small arc power and electrocorrosion ratio after arc extinction, thus to improve the breaking capability on short-circuit current and electric life.
  3. The VCB applies to rigorous occasions such as high altitude and frequent operation.
  4. As long as the VCB accord to the mechanical characteristics, the client may select adaptable electromagnet or spring operation mechanism according to special situation.

• ZN28-12(ZN28A-12) Indoor High Voltage Vacuum Circuit Interrupter

  

  

   

• ZN28-12(ZN28A-12) Indoor High Voltage Vacuum Circuit Interrupter

  

   

  About us

  We are specialty on providing medium voltage and high voltage circuit breaker and switchgear components, such as 12KV, 24 KV, 36KV and 40.5KV embedded cylinder,insulated operating rod, auxiliary circuit socket, counter, circuit breaker board,vacuum circuit breaker plastic panel, connection terminal, high voltage vacuum circuit interrupter and so on. These components apply on 630A, 1250A, 2500A, 3150A and 4000A VS1 (ZN85-40.5) circuit breaker and KYN28A-12 and KYN61 high voltage switchgear.