Product Name: Zn85-36 (40.5) kV Indoor Vacuum Circuit Breaker Certification: ISO9001-2000, CE Function: Conventional Circuit Breaker Type: Circuit Breaker Poles Number: 3 Structure: ACB Installation: Fixed Arc-extinguishing Medium: Air Speed: Normal Type Circuit Breaker Operation: Electric Type Breaking Capacity: High Voltage Circuit Breakers Product Description ZN85-36(40.5)KV/T2000A-31.5LA type indoor M.V. VCB is suitable for the power system tri-phase AC 50Hz,rated voltage36(40.5)KV,for industrial and mining enterprises power plants and substations,as the division of load current,overload current,fault current purposes. The circuit breaker arranged with upper and lower structure,effectively reduce the depth of circuit breaker.The spring operating mechanism designed for this new type circuit breaker installing in the breaker frame,Its structure feature is more suitable for upper and lower type of circuit breaker,and becomes s key part of breaker overall structure simple design,output cuive,and performance are more suitable for the characteristics and requirement of 36(40.5)kv VCB.ItemDataRated voltage36(40.5)kVRated insulation level 1 min power frequency withstand voltage(effective)95kVRated insulation level lightning impluse withstand voltage (peak)185kVRated frequency50HzRated current1250,1600,2000A4s rated short time withstand current25,31.5kARated peak withstand current63,80kARated short circuit breaking current25,31.5kARated short circuit making current63,80kARated operation sequenceO-0.3S-CO-180s-COBreaking times of rated short circuit breaking current20Rated capacitor bank breaking current630Mechanical life10,000ItemDataClearance between open contacts18±1mmOver travel4±1mmContact limit erosion of over travel3mmAverage closing speed1.0-1.6m/sAverage opening speed(Contact separation 12mm)1.3-1.7m/sContact bouncing duration at closing operation≤3Three phase contact closing non-simutaneity of contacts≤2Three phase contact opening non-simutaneity of contacts≤2Maximum rebound during opening≤3Buffer stroke13±1Circuit resistance≤65