New Concept Electric Inc.  

Product Name: Lw -12 Primary and Secondary Side Combination Circuit Breaker Model NO.: LW -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 Box Specification: 12kV Origin: China HS Code: 85352100 Product Description LW-12/630-20 outdoor high voltage AC circuit breaker, which integrates the design concept of "intelligence, safety and maintenance free", combines the actual situation of distribution network and the requirements of smart grid construction in China, adopts the primary and secondary integration technology, designs and develops a new type of circuit breaker which fully meets the requirements of national network of primary and secondary integration circuit breaker set.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 currentA630/1250CT parameterSatisfy national state primary and secondary combination parameter requirementsRated 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 MechanismSpringMechanical life of vacuum circuit breakerTime10000Shell protection degreeIP67Shell is made up of stainless steel, and meets the requirement of corrosion resistance for permanent use;Explosion-proof pressure relief device is added to avoid circuit breaker bursting due to increase of arc fault pressure inside the switch;A low pressure blocking device is installed to make the gas pressure in a dual control state, which improves the reliability of switch operation;The incoming and outgoing terminal bushing is changed into an organic insulator type to completely eliminate the rupture of the porcelain bottle caused by external force and lightning and the cracking caused by ceramics, which greatly improves the reliability of circuit breaker operation.Manual locking device is installed to effectively prevent misoperation during power failure operation.Increasing the phase distance of switch to 250mm can greatly reduce the inter-phase flashover and short-circuit faults.The technique of incoming and outgoing bushing is improved to effectively prevent the interphase flashover fault caused by corona discharge in the operation of circuit breaker.