FZN25-12D indoor AC high-voltage vacuum load switch is an indoor device with three-phase AC 50Hz and rated voltage of 12kV. It is applicable to industrial and mining enterprise distribution substations, substations and other occasions. As the protection and control of electrical facilities, it is used for switching load current, closed-loop current, no-load transformer and cable charging current. The grounding switch with the ability to close the short circuit current is equipped. The operating mechanism can be operated manually and electrically, which is convenient to realize the three remote control requirements of the power system.

Work conditions

Altitude ≤ 1000m

Ambient air temperature: upper limit+40 ℃, lower limit - 25 ℃ (storage and transportation allowed at - 30 ℃)

The daily average value of relative humidity of air is not more than 95%, and the monthly average value is not more than 90% 

Seismic capacity: seismic intensity shall not exceed 8

The surrounding air shall not be obviously polluted by corrosive or combustible gases, water vapor, etc

No frequent severe vibration

The pollution level shall not exceed Level II

Executive Standards

GB3804-2004 3.6KV~40.5KV AC High Voltage Load Switch

GB16926-2009 AC High Voltage Load Switch-Fuse Combinations

IEC265-1 High-voltage load switch Part I: High-voltage load switch with rated voltage above 1kV and below 52kV

IEC420 (1990) High-voltage AC load switch-fuse combination apparatus