ZW7-40.5 Outdoor Vacuum Circuit Breaker

Product Description

Product Description of ZW7-40.5 Outdoor Vacuum Circuit Breaker

General ZW7-40.5 Series outdoor high voltage vacuum circuit breaker is rated voltage 40.5kV, three phase AC 50Hz outdoor distribution equipment. Mainly used for breaking, closing power system load current, overload current and short-circuit current. Applicable to substations and power distribution in industrial and mining enterprises for protection and control purposes, and frequent operation place for rural power grids.

Outdoor Vacuum Circuit Breaker Service environment conditions

a) Ambient Air Temperature:  +45ºC ~ -45ºC
b) Humidity: Monthly average humidity 95%; Daily average humidity 90%.
c) Altitude above sea level (Maximum installation altitude): not more than 2500 meters.
d) Ambient air should be not apparently polluted by corrosive and flammable gas, vapor etc.
e) The wind speed is not greater than 35m/s.
f ) Anti-contamination level for grade IV
g) The earthquake intensity does not exceed 8 degrees.

Overall dimension

Outdoor Vacuum Circuit Breaker Parameters

No.ItemUnitParameters
1Rated voltageKV40.5
2Rated frequencyHz50/60
3Rated currentA630/1250
4Rated short-circuit breaking currentkA31.5
5Rated peak value withstand current(peak)kA50/63
6Rated short time withstand currentkA20/25
7Rated short-circuit closing current (peak)kA50/63
8Mechanical lifeTimes10000
9Rated short-circuit breaking current breaking numberTimes30
10Power frequency withstand voltages (1 min), wet/dry: inter-phase, earth, fracture KV80/95
11Lightning impulse withstand voltage (peak) inter-phase ,earth, fractureKV185
12Rated operate sequence O-0.3-CO-180S-CO
13Secondary circuit 1min power frequency voltagesKV2

Outdoor Vacuum Circuit Breaker Feature And Application

The circuit breaker has the features of small size, light weight, anti-condensation, maintenance and so on. Adapt to bad weather conditions and dirty environments.