11 -33kV Vacuum Circuit Breaker

  • ZW20-12F Outdoor High Voltage Boundary Vacuum Circuit Breaker
  • ZW20-12F Outdoor High Voltage Boundary Vacuum Circuit Breaker

ZW20-12F Outdoor High Voltage Boundary Vacuum Circuit Breaker

ZW20-12F outdoor high voltage vacuum demarcation circuit breaker (watchdog switch) is an outdoor power distribution device with a rated voltage of 12KV and a three-phase AC 50Hz. 

ZW20-12F outdoor high voltage vacuum demarcation circuit breaker (watchdog switch) is an outdoor power distribution device with a rated voltage of 12KV and a three-phase AC 50Hz. When the user’s internal fault occurs in the T-type wiring of the 12KV distribution line, or although it occurs inside the user’s incoming switch, but its protection action time limit and the substation’s outgoing switch protection are improper, it will cause the substation’s outgoing switch protection to open. If the fault is permanent and the substation recloses unsuccessfully, an accident in the medium voltage user’s field will cause the entire distribution trunk to be out of power. This common spread accident in the power grid will cause significant losses to society. ZW20-12F outdoor high voltage vacuum demarcation circuit breaker (watchdog switch) is installed at the responsibility demarcation of the overhead power distribution line. The front end of the user’s incoming line will automatically remove the single-phase ground fault and inter-phase short-circuit fault within the user to avoid Faults in the user’s world spread to the main transmission line to ensure the safety of electricity use for non-faulty users and improve the reliability of electricity use.

demarcation circuit breaker

Main Technical Parameters

N oItemUnitData
1Rated voltagekV12
2Rated frequencyHz50
3Rated currenA630100
4Rated short-circuit breaking currentkA2025
5Rated peak withstand currentkA5063
6Rated short-time withstand currentkA2025
7Rated short circuit switching currentkA5063
8Rated operation sequenceopen-0.3s-close open-180s-close open
9Mechanical lifTimes10000
10Rated current breaking timesTimes10000
11Rated short-circulit breaking timesTimes30
12Frequency withstand voltage 1min(Wet)interphase,to earthkV34
(Dry)interphase,to
earth/Fracture
kV42/48
13Lightning impulse withstand voltageinterphase,to earth/FracturekV75/85
14Secondary circuit 1 min power frequency withstand voltageV2000
15Weightkg140
16Contact opening distancemm9
17Contact contacting strokemm3
18Average opening speedm/s12±0.2    +1/-0.5
19Average closing speedm/s0.6±0.2    +1/-0.5
20rated operation voltageVAC/DC220
21SF6 gas rated pressure (gauge pressure)MPa0

Appearance And Installation Dimensions

Appearance And Installation Dimensions
Copyright © 2007-2024 Delixi All Rights Reserved.    浙ICP备13001006号-1  浙ICP备13001006号-3