Zw7-40.5 outdoor high-voltage vacuum breaker(the breaker for short) is used in triphase power system of AC50HZ,40.5KV.It can be used to open and close the current, which has the function of protecting overloading and short current.
Features,
a. The breaker is adopted the vacuum in terruption and has strong ability of closing and long life time. This mechanical life reaches 10000 times.
b. The structure is simple and maintenance-free. It also has long period of no-overhauling
c. It has the characters of good insolating ability and strong stain removal ability.
d. Spring and magnetic control mechanism can be configured. Mechanical energy is reliable and can be used frequently. There is no hidden trouble of fire and bombing.
e. Inside, mutual inductor of which measuring accuracy reaches level0.2 is installed. It can realize the protection of triphase differential.
f. There is condensation controller inside, which can protect the breaker to operate under the condition of certain temperature and humidity.
Using environmental conditions ,
a. ambient air temperature, upper limit+40, lower-30(general area)-40(extreme cold area)
b. elevation,<1000m(If there is any need to increase the elevation, the rated insulation level should be increased properly.)
c. wind pressure, less than 700pa(the same as 34m/s wind speed)
d. Amplitude, The earthquake intensity does not exceed 8 degrees
e. pollution level, level 3
f. daily range of temperature ,less than 25