high voltage vacuum circuit breaker

Description

ZW***0.5 outdoors high voltage vacuum circuit breaker 1. Outline The ZW***0.5 outdoors high vacuum circuit breaker uses in to exchange *0Hz, the *0.5kV 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 GB******9 \"***** high voltage Circuit breaker\" and international electrician committee standard IEC*6 \"High-pressured Exchange Circuit breaker\" request. Circuit breaker main characteristic a ï&frac*4;Ž Uses the vacuum extinguishing of arc, opens breaks the ability strongly, the electricity life is long, mechanical life *0, **0; b ï&frac*4;Ž Structure simple, exempts the maintenance, the overhaul period is not long; c ï&frac*4;Ž Insulating ability good, the anti- contamination ability is strong; d ï&frac*4;Ž 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 ï&frac*4;Ž The internal installation current transformer measuring accuracy reaches 0.2 level, may realize the three-phase differential motion protection; f ï&frac*4;Ž 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 *0 ℃ lower limits general areas **0 ℃ , high and cold area **0 ℃ ; B. elevation does not surpass ***0m; C. wind pressure does not surpass **0Pa (to be equal to wind speed *4m/s); D. earthquake intensity does not surpass 8; E. air contamination degree III level