summary

FZN21-40.5 high-voltage vacuum load switch and combined electrical appliance are applicable to three-phase AC 40.5kV, 50HZ power system, or used together with a set of power distribution equipment, ring-network switch cabinet, combined AC power station, etc., and are widely used in wind power generation, construction and transformation projects, industrial and mining enterprises, high-rise buildings and public facilities. They can be used as ring-network power supply units or terminal equipment, playing the role of power distribution, control and protection. The technical performance of the product meets the requirements of GB16926-1997 AC High Voltage Load Switch - Fuse Combinations and IEC42O AC High Voltage Load Switch - Fuse Combinations.

This product has the advantages of large breaking capacity, safety and reliability, long electrical life, frequent operation, compact structure, small size, light weight, and basically no maintenance. It has the ability to break the rated current, overload current, short circuit current and prevent the equipment from running out of phase. The switch has obvious visible isolation fracture. It is equipped with grounding switch and electric spring mechanism with closing ability, and has the ability of remote control.

Normal use environment

◇ The ambient air temperature shall not exceed 40 ° C, and the average plant temperature measured within 24 hours shall not exceed 35 ° C, and the lower ambient air temperature shall be - 25 ° C;

◇ The influence of solar radiation can be ignored;

◇ The altitude shall not exceed 1000m;

◇ The surrounding air is not obviously polluted by dust, smoke, corrosion, corrosive and/or flammable gas, steam or salt mist;

◇ The daily average relative humidity shall not exceed 95%; The daily average value of water vapor pressure shall not exceed 22kPa; The relative humidity of the lunar phase shall not exceed 90% of the average value; The average monthly water vapor pressure shall not exceed 1.8KPa;

◇ 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.