•   ZW20F-12KV 630/1250A High Voltage Vacuum Circuit Breaker
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ZW20F-12KV 630/1250A High Voltage Vacuum Circuit Breaker

Model: ZW20F-12KV

Description:

ZW20F -12 outdoor high voltage vacuum circuit breaker (watchdog switch), installed in the responsbility boundary of the overhead distribution line, which is the front end of the user's incoming line, will automatically remove the single- phase ground fault and the phase-to -phase short-circuit fault within the user, avoiding the faults in the user's boundary and the power transmission trunk, and ensuring the safety of the non-faulty users,to improve the reliability of electricity consumption.
Accept OEM&ODM:YES
Certificate: CE,Test reports
Production time: 7~ 12 working days
Warranty period: 12 Months
Delivery time: 15 days
Payment term: 50% deposit before production+50% balance before shipment(by T/T,D/P,Paypal)
  • General
  • Technical Parameter
  • ZW20F-12 outdoor high voltage vacuum circuit breaker (watchdog switch) is an outdoor power distribution equipment with rated voltage of 12KV and three-phase AC 50 Hz. When the internal fault occurs in the user of the T-connection of the 12KV distribution line, or it occurs inside the user's incoming switch, but the protection action time limit and the substation outlet switch are improper protection, the substation outlet switch will be opened. If the fault is permanent and the substation coincides unsuccessully, an accident in the medium voltage user community will power down the entire distribution trunk.This kind of common accident in the power grid will cause great losses to society. ZW20F -12 outdoor high voltage vacuum circuit breaker (watchdog switch), installed in the responsbility boundary of the overhead distribution line, which is the front end of the user's incoming line, will automatically remove the single- phase ground fault and the phase-to -phase short-circuit fault within the user, avoiding the faults in the user's boundary and the power transmission trunk, and ensuring the safety of the non-faulty users,to improve the reliability of electricity consumption.

    Model Meaning

    Drawing

    Environmental

  •   No. Item Unit Data
    Rated voltage KV 12
       2 Rated frequency Hz 50
       3 Rated current A 630 1000
       4 Rated short circuit breaking curren KA 20 25
       5 Rated peak withstand curreni KA 50 63
       6 Rated short-time withstand curren KA 20 25
       7 Rated short circuit closing current KA 50 63
       8 Rated operating sequence O-0.3s-CO-180s-CO
       9 Mechanical life Times 10000
      10 Rafed current breaking fimes Times 10000
      11 Rated short circuit breaking times  Times 30
      12 power frequency withstand voltage (1 min)                      (Wet)phase to phase,to earth   KV 34
      power frequency withstand voltage (1 min) (Dry\phase to phase,to earth/between open contacts KV 42/48
      13 Lightning impulse withstand voltage phase to phase,to earth/between open contacts KV 75/85
      14 Secondary circuit 1 min power frequency withstand voltage V 2000
      15 Weight kg About 140
      16 Clearance between open contacts mm 9
      17 Contact contact stroke mm 3
      18 Average closing speed m/s 1.2±0.2
      19 Average opening speed m/s 0.6±0.2
      20 Rafed operafing volfage V AC/DC220
      21 SF6 gas rated pressure (gauge pressure MPa 0
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