DW45 series air circuit breaker(hereinafter referred to as breaker)is suitable for the circuit of AC 50Hz with rated voltage 400V,690V and rated current up to 6300A.It is mainly used to distribute electric energy and protect circuits and power-supply equipment from over-load,under-voltage,short-circuit and single-phase earthing.with intelligentized and selective protection functions,the breaker can improve the reliability of power supply,and avoid unnecessary power failure. The breaker is applicable for power stations,factories,mines(for 690V) and modern high-buildings,especially for the distribution system of intelligentized building.This breaker conforms to IEC60947-2 and GB14048.2.The whole series have past CCC certification and CB certification of SEMKO.

 

Environment conditions for operation:

Environmental temperature Tempeerature condition:-5^oC ~+40^oC ;the average value within 24h shall not exceed +35(Speial situation excluded )Elevation Altnmosphere condition Relative humidity at +40^oC. shall not exceed 50%.higher hum-idity is permissible at lower temperature condition. when the highest monthly average relative humidity is 90% in the humiddext month,the lowest monthly average temperature of this month is +25^oC.And consider the influence of dew on product surface due to temperature changes.pollution grade:grade The breaker should be installed caccording to the requirements on the instruction manual.The vertical inclination degree shall not exceed 5^o