summary:
ZN85-40.5 series indoor high-voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is applicable to three-phase AC 50Hz, rated voltage 40.5kV power system, and can be used by industrial and mining enterprises, power plants and substations as load current, overload current and fault current. The circuit breaker and operating mechanism are arranged up and down, which effectively reduces the depth of the circuit breaker.
Three-phase arc extinguishing chamber and associated charged body are separated by three independent epoxy resin insulation cylinders, forming a composite insulation structure. The circuit breaker meets the requirements of air distance and creepage distance under normal operating conditions, and effectively reduces the volume of the circuit breaker. The vacuum arc extinguishing chamber of the main electrical circuit and the dynamic and static conductive connection are installed in the insulating cylinder, so that the phase spacing is only 300mm. The electrical connection of the main circuit is all fixed, with high reliability. The insulating cylinder is installed above the circuit breaker frame.
The spring operating mechanism specially designed for this circuit breaker is installed in the circuit breaker frame. Its structural characteristics are more suitable for the upper and lower layout of the circuit breaker, and become an integral part of the circuit breaker's overall structure. The mechanism design is simple, and the output curve and its performance are more suitable for the characteristics and requirements of 40.5kV vacuum circuit breaker.
The overall layout is reasonable, beautiful and concise. Small size, flexible operation, reliable electrical performance, long service life, convenient maintenance and maintenance-free mechanism. The circuit breaker is suitable for frequent operation, various occasions and places with harsh operating conditions.
Model meaning:
GB1984-2003 High Voltage AC Circuit Breakers;
GB/T11022-1999 Common Technical Requirements for High-voltage Switchgear and Controlgear Standards;
IEC62271-100 High Voltage AC Circuit Breakers.
Normal use environment:
◇ Ambient air temperature: no more than 40 ° C; The daily average temperature shall not exceed 35 ° C; Lower ambient air temperature is - 15 ° C o
◇ Relative humidity of air: the daily average value is not more than 95%, and the monthly average value is not more than 90%; The daily average value of water vapor pressure is not more than 2.2kPa; The monthly average value is not greater than 1.8kPa; ◇ Altitude: not more than 1000m;
◇ There is no obvious pollution of dust, smoke, corrosive and combustible gas, steam or salt mist around; ◇ Vibration or ground motion from the outside of switchgear and control equipment can be ignored;
◇ The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kV.
◇ The installation site for special use conditions is at a place where the sea level exceeds 1000m, the ambient air temperature exceeds the limit value specified by the normal use conditions, or the high humidity is prone to condensation, please consult with us for customization.
Product technical features:
◆ The circuit breaker has excellent overall performance
◇ The overall structure of the circuit breaker is simple and reasonable, and the arc-extinguishing chamber and the interlocking and operating parts are arranged up and down.
◇ The special spring operating mechanism is stable and reliable without adjustment.
◇ The installation form is free and flexible, including withdrawable handcart cabinet installation and side mechanism layout fixed installation.
◆ Insulating barrel with high reliability
◇ The insulating cylinder is made of epoxy resin with reliable mechanical and electrical performance through mature vacuum casting process.
◇ The vacuum arc extinguishing chamber is arranged in the closed insulation cylinder, which can significantly improve the insulation performance, avoid the impact of the harsh external environment, and effectively prevent dust and foreign matters from entering the main circuit.
◇ Reduce the overall size of the circuit breaker.
◆ Vacuum arc extinguishing chamber
WL-35855X vacuum arc extinguishing chamber comes from the quality assurance of Cutler-Hammar Company.
◇ The optional coil type vertical strong magnetic field structure vacuum arc extinguishing chamber is made of ceramic shell, copper-chromium contact material, small size, high insulation level, strong arc extinguishing ability, long electrical life, and excellent performance of breaking and closing short circuit current.
◆ Optional cementing process
◇ The main electrical circuit of the circuit breaker adopts the solid sealing process, and the vacuum arc extinguishing chamber is poured into the insulating cylinder.
◇ The insulation strength is improved.
