The LW34-12/T630-20 outdoor pole-mounted SF6 circuit breaker isa new generation of complete pole-mounted switchgear productsdeveloped by our company in accordance with the national grid’sfirst and second-level technical integration standards. The switchconfiguration fully complies with the requirements of the nationalgrid’s first and second-level technical integration standards. Theswitch has a compact structure, reasonable layout, comprehensivefunctions, and all indicators meet the requirements of the nationalgrid’s first and second-level integration. lt adopts unified parameterprotection electronic CT, electronic zero-sequence CT, andelectronic zero-sequence voltage sensor, with a wide measurementrange, high measurement accuracy, stable reliability, and low powerloss. The analog quantity is complete, facilitating accuratedetermination of various faults in the line.
The LW34-12/T630-20 outdoor pole-mounted SF6 circuit breaker, incoordination with the FTU, has intelligent functions such asmeasurement, protection, control, signaling, remote operation andnetworking, online monitoring and diagnosis, precise groundingjudgment, and line loss metering.lt is suitable for 10kV overheaddistribution lines and user branch lines. lt provides protection forthree-phase users’ phase loss protection and overvoltage protectioncaused by harmonics.lt can quicklyisolate the fault section, keepingthe fault isolated within the user boundary section, preventing thespread of faults to the entire distribution line, and avoiding large-scale power outage accidents.Equipped with FTU,RS-232/RS-485communication interfaces, and communication modules, it forms a”centralized control” distribution network automation system withthe main station. Without the need for communication and the mainstation, VITC between switches automatically cooperates tocomplete feeder automation for the entire line.
Ambient condition
Altitude: Below 3000m;
AmbientTemperature:-40~80°C.
Humidity: 0-100%(Relative humidity);
Maximum Daily Temperature Difference: ≤25°C;
Wind Pressure:≤700Pa (Equivalent to a wind speed of34m/s):Seismic Resistance: According to 8 degrees fortification, horizontal ground acceleration 0.25g,vertical acceleration0.125g, withstand three times of positive sine waves/horizontal and vertical acceleration simultaneously, consideringthe influence of the lead-out line end tube connecting the conductor and vibration.Pollution Level:Class lll.Class lV:
lce Thickness:10mm;
Snow Load:35mm.
Standards
GB 311.1 – insulation coordination for high voltage power transmission and transformation equipmentGB 1985-High-voltageACisolating switches and earthing switches
GB 3804-3.6kV~40.5kV High-voltage Ac load switches
GB 50150-Test code for acceptance ofelectrical equipmentinstallations
GB/T 11022 -Common specifications for high-voltage switchgear and controlgear standards
GB/T20840.8-Electroniccurrenttransformers
GB/T 22071.2 – Guidelines for transformer tests -Part 2: Electromagnetic voltage transformers
DL/T 593 -Common specifications for high-voltage switchgearand controlgear standards
GB1208-Currenttransformers
GB 3309-Mechanical properties test for high voltage switchgear at normal temperature
GB 4208-Degrees of protection provided by enclosuresGB/T 8905 – Guidance for management and measuring in sulfur hexafluoride (SF6) gas in electrical equipment
GB/T20840.7-Electronic voltage transformers
GB/T 22071.1 -Guidelines fortransformer tests-Part 1: Current transformers
DL/T 486-AC high-voltageisolating switches and earthing switches
