1. Outline
The ZW7-40.5 outdoors high vacuum circuit breaker uses in to exchange 50Hz, the 40.5kV three-phase electrical power system, the achievement divides, of of gathers using of the load current, the excess current and the short-circuit current.
This circuit breaker conforms to national standard GB1984-89 "A. C. High voltage Circuit breaker" and international electrician committee standard IEC56 "High-pressured Exchange Circuit breaker" request.
Circuit breaker main characteristic
A. Uses the vacuum extinguishing of arc, opens breaks the ability strongly, the electricity life is long, mechanical life 10, 000;
B. Structure simple, exempts the maintenance, the overhaul period is not long;
C. Insulating ability good, the anti- contamination ability is strong;
D. May match the spring or the electromagnetism holds the drive mechanism, the machine capability is reliable, but frequently operates; Does not have the fire and the detonation hidden danger;
E. The internal installation current transformer measuring accuracy reaches 0.2 level, may realize the three-phase differential motion protection;
F. Congeals the dew controller, can maintain the circuit breaker under the certain temperature humidity the reliable movement.
2 Circuit breaker exploitation conditions
A. Surrounding air temperature upper limit +40 degree lower limits general areas -30 degree, high and cold area -40 degree;
B. Elevation does not surpass 1000m;
C. Wind pressure does not surpass 700Pa (to be equal to wind speed 34m/s);
D. Earthquake intensity does not surpass 8;
E. Air contamination degree III level
3 Main technical parameter
Audited Supplier 
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