Product introduction: FZW28-12F outdoor demarcation vacuum load switch (referred to as demarcation switch) is used in the occasion of outdoor column installation, with manual and electric operation function. The switch body adopts VSP5-12 technology imported from Toshiba Corporation of Japan. This switch is a maintenance-free load switch. The use of vacuum extermination and SF6 gas as the insulating medium for ground and phase. This product complies with: G83804 (High Voltage AC Load Switch) and GBT11022 "Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards". FZW28-12F outdoor demarcation vacuum load switch has fault detection function, protection control function and communication function, installed at 10kV On overhead lines, it can realize automatic removal of single-phase grounding faults and automatic isolation of short-circuit faults between phases. The installation point is suitable for the responsibility demarcation point of the 10kV distribution line user's incoming line; it can also be applied to the branch line connection that meets the requirements. Normal conditions of use: Ambient temperature: not higher than +40ºC, not lower than -15ºC; Air relative humidity: the daily average is not more than 95%, and the monthly average is not more than 90%; The altitude does not exceed 1000 meters; Earthquake intensity does not exceed 8; A place free from fire, explosion, serious pollution, chemical corrosion and severe vibration. Product Drawing: