ORIENT ELECTRIC INTERNATIONAL GROUP LIMITED  

Product Name: Zw8-12 Outdoor High Voltage Vacuum Circuit Breaker Model NO.: zw8-12 Certification: ISO9001-2000 Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection Type: Circuit Breaker Poles Number: 3 Structure: ACB Installation: Fixed Arc-extinguishing Medium: Vacuum Speed: Normal Type Circuit Breaker Operation: Manual Type Breaking Capacity: High Voltage Circuit Breakers Transport Package: Wooden Packing Origin: China Product Description ZW8-12 Outdoor high voltage vacuum circuit breaker for three-phase AC rated volatge 12kV,50Hz outdoor high voltage switch equipment,maily used for breaking off farming net,city net and small power system load current,overload current,short circuit ciurrent.The product structure for three-phase commom box type,three-phase vacuum arc extinguish chamber is arranged in the metal box,the use of SMCinsulation material and insulation and insulation to ground,reliable performance,high insulation strength.SINameunitparameter6.3kA12.5kA20kA1 Rated voltagekV122 Rated currentA6303 Rated short-circuit load breaking currentkA6.312.5204 Rated short circuit closing current (peak)kA1631.5505 Rated peak withstand currentkA1631.5506 Rated short-time 1min withstand currentkA6312.5207Rated insulation level Power frequency withstand voltage (dry type)kV42 Lightning impulse withstand voltage (peak)758 Rated operation sequenceSeparate -0.3S-combination-180 S-combination9 Mechanical lifetimes1000010 Rated short-circuit breaking current breaking timestimes3011 Operating mechanism rated closing voltageV110,22012 Operating mechanism rated trip currentA110,22013 Contact opening distancemm11±114 Overtravel (contact spring compression length)mm3-0.3+1.015 Three-phase separation and closingms≤216 Contact closing bounce timems≤217 Average opening speedm/s1.0±0.218 Average closing speedm/s0.7±0.1519 Opening time At the highest operating voltages0.015-0.05 At the lowest operating voltage0.03-0.0620 Opening times0.025-0.0521 Main loop resistance of each phaseμΩ≤12022 Dynamic and static contacts allow friction to accumulate thicknessmm3