Product Overview

ZW20-12F/T port-port series outdoor high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is outdoor power distribution equipment with rated voltage of 12kV and three-phase AC of 50Hz.

Product Features

The box adopts VSP5 gas sealing, explosion-proof and green-proof structure technology, and the inlet and outlet conduits have also improved their sealing performance. The overall sealing performance is excellent, and the SF6 gas filled inside does not leak and is not affected by the boundary environment. Its spring operating mechanism has been miniaturized and optimized for reliability and stability. It adopts direct chain main drive and multi-stage tripping system, action reliability and stability than the domestic traditional spring operating mechanism to improve several times; the main circuit of the shaft and the sleeve of the contact between the use of the internal external tensioning bracelet structure, the main circuit of the contact resistance is small, low temperature rise. Therefore, the ZW20-12F type outdoor column vacuum circuit breaker is a maintenance-free product.

Main technical parameters of products

Serial Number Project Unit Data
01 Rated voltage kV 12
02 Rated frequency Hz 50
03 Rated current A 630 1250
04 Rated short-circuit breaking current kA 20 25
05 Rated peak withstand current kA 50 63
06 Rated short-time withstand current kA 20 25
07 Rated short-circuit closing current kA 50 63
08 Rated operating sequence   Points -0.3s-combined points -180s-combined points
09 Mechanical life Times 10000
10 Rated current breaking times Times 10000
11 Rated short-circuit breaking times Times 30
12 Power frequency withstand voltage 1min (Wet) Interphase, to the ground kV 34
(Dry) Interphase, to ground/fracture kV 42/48
13 Lightning impulse withstand voltage Interphase, to ground/fracture kV 75/85
14 1min power frequency withstand voltage of secondary circuit v 2000
15 Quality kg Approximately 140.
16 Contact opening distance mm 9±1
17 Contact stroke of contact mm 2.5±0.5
18 Average gate speed ms 1.2±0.2
19 Average closing speed m/s 0.6±0.2
20 Rated operating voltage v AC/DC220
21 Rated pressure of SF6 gas (gauge pressure) MPa 0