Vacuum circuit breaker ZW37-40.5kV

three-phaseACoverload

ZW37-40.5 type vacuum circuit breaker is outdoor high voltage switch equipment with rated voltage 40.5 kV, tri-phase AC 50 Hz. It mainly used to open and close electric power system load current, overload current and short circuit current. Applicable to substations, industrial and mining enterprises and the urban and rural electric protection and control, especially suitable for frequent operation sites and city network automation distribution network. 2.Normal service conditions 1) Altitude above sea level not exceeding 1000m 2) Air polluted degree: IV 3) Environmental ambient temperature:-35ºC~+40ºC 4) Ice covering thickness: 20mm 5) Monthly average relative humidity not exceeding 90% Daily average relative humidity not exceeding 95% 6) Wind speed not exceeding 34m/s 7) Installation site: without flammable, explosive or corrosive material, and frequent violent vibration. 8) Earthquake intensity not exceeding 8 degree