ZW20-12 series vacuum circuit breakerDetailed product description：

1、 Overview
The ZW20-12 series vacuum circuit breaker is a high-voltage outdoor switchgear with a rated voltage of 12kV and three-phase AC 50Hz. It is mainly used to open and close load current, overload current, and short-circuit current of rural power grids, urban power grids, and small power systems. The overall structure of this product is a three-phase common box, with a three-phase vacuum arc extinguishing chamber placed inside a metal box. The transformer performance is reliable and the insulation strength is high. The operating mechanism of this series of products is spring energy storage type, which is divided into two types: electric and manual. The circuit breaker complies with the regulations of GBl804, DL403, GBll022 and other standards. Whether under normal use conditions or fault conditions (especially short-circuit situations), as long as it is within the technical parameters of the circuit breaker, it can ensure safe and reliable operation in the corresponding voltage level of the power grid.  

2、 Normal operating conditions of ZW20-12 series vacuum circuit breaker
l、 Environmental temperature: -45 ℃ -+40 ℃:
2. Altitude: not exceeding 1000m
3. Wind speed not exceeding 35m/s:
4. Relative temperature: daily average not exceeding 95%, monthly average not exceeding 90%:
5. Earthquake intensity not exceeding 8 degrees:
6. Places without fire, explosion, severe pollution, chemical corrosion, and severe vibration

3、 Main technical parameters of ZW20-12 series vacuum circuit breaker:

serial number	project	unit	Technical Requirements
one	rated voltage	KV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty
four	Rated short-circuit breaking current	KA	twenty
five	Peak rated closing current	KA	fifty
six	Peak value of rated dynamic stability current	KA	fifty
seven	4S thermal stability current	KA	twenty
eight	Rated operating sequence		Fen-0.3S-180S-Fen
nine	Rated voltage of energy storage motor	V	AC220
ten	Maximum/minimum voltage of energy storage motor	V	AC242/187
eleven	Rated closing operation voltage	V	AC220
twelve	Maximum/minimum closing operation voltage	V	AC264/143
thirteen	Rated opening operation voltage	V	AC220
fourteen	Maximum/minimum voltage for opening operation	V	AC264/143
fifteen	Closing at different stages	ms	≤2
sixteen	Open at different stages	ms	≤2
seventeen	Rated pressure of SF6 gas (gauge pressure)	MPa	zero point zero one
eighteen	Rated short-circuit current breaking times	time	thirty
nineteen	mechanical life	time	ten thousand
twenty	Electrical lifespan	time	ten thousand

ZW20-12 series vacuum circuit breaker