New Concept Electric Inc.  

Product Name: Zw20-12 Outdoor Circuit Breaker 12kv Spring Mechanism Model NO.: ZW20-12 Certification: ISO9001-2000 Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection), RCCB Type: Circuit Breaker Poles Number: 3 Structure: ACB Installation: Fixed Arc-extinguishing Medium: Vacuum Speed: High-Speed Circuit Breaker Operation: Electric Type Breaking Capacity: High Voltage Circuit Breakers Trademark: NCE Transport Package: Plywood Case Specification: 12kV Origin: China HS Code: 85352100 Product Description ZW20-12 type outdoor high voltage AC vacuum circuit breaker is designed by our company as a circuit breaker sharing same cabinet. Its main use is to open, close load current, overload current and short circuit current in electrical system, and it is adaptable to protection and control function in substations and industrial and mining enterprises power distribution system, and also rural areas with frequent power grid operations. This switch use vacuum method to extinguish arc, SF6 gas to insulate, and overall sealing is good. Internal is filled with "zero" gauge pressure SF6 gas, no possibility of gas leakage, high reliability, and maintenance-free.DescriptionUnitUsing Environment ValueAmbient Air TemperatureMax TemperatureºC+50Min Temperature-20Max Daily Temperature DifferenceK30Altitudem≤3000Solar Radiation IntensityW/cm20.1Pollution ClassIVIcing Thicknessmm10HumidityAverage Value of Daily Relative Humidity%≤100Average Value of Monthly Relative Humidity≤95Earthquake Tolerance AbilityDegree≤8Rated voltagekV12Rated currentA630CT parameterAccording to customer's requirementRated frequencyHz50Rated short time(1 min) power frequency withstand voltage(To earth/fracture)kV42/48Rated lightening impulse withstand voltage(To earth/fracture)kV75/85Rated short circuit breaking currentkA20/25Rated short circuit close current(peak value)kA50/63Rated short time withstand current(4s)kA20/25Rated peak withstand currentkA50/63Rated short circuit current break timesTime30Operation MechanismSpring(Permanent Magnetic)Mechanical life of vacuum circuit breakerTime10000(30000)Shell protection degreeIP67Leakage rate per year%<0.01Flexible and convenient operation: this product can either use electricity to store energy, open and close using electricity, or store energy manually, open and close using hand, and can use remote control to operate with near distance and long distance;Operation power factor small, high reliability;Flexible installation method, can use hoisting on columns or sitting installation method;Have maintenance free characteristic; circuit breaker main circuit, second side components, operation mechanism are sealed in SF6 gas (zero surface voltage);Not influenced by outside environment, stable performance, reliable and maintenance-free.Reliable sealing performance, use mature sealing structure technique to ensure reliable sealing.Incoming and outgoing insulation performance is good, use silicone rubber bushing to make insulation space between connection terminals abundant, and external insulation performance is excellent and safe to use.