FKN12-12D/630-20 High Voltage Load Switch | Indoor AC High Voltage Load Switch - Fuse Combination Apparatus

Overview

FKN12-12D/630-20 indoor AC high voltage load switch (hereinafter referred to as FKN-12D load switch) is a three-phase high voltage switchgear with rated voltage of 12kV and rated frequency of 50Hz, used for making and breaking load current, closed loop current, no-load transformer and cable charging current, and making short-circuit current. The load switch equipped with an earthing switch can withstand short-circuit current. FKN12-12D/630-20 High Voltage Load Switch adopts a vacuum interrupter, with breaking capacity up to 20kA, mechanical life over 10,000 times, and is a reliable making and breaking and isolating device in 12kV distribution systems.

FKN-12R.D/125-31.5 indoor AC high voltage load switch-fuse combination apparatus (hereinafter referred to as FKN-12R.D combination apparatus) is an indoor high voltage switchgear combining FKN-12D load switch and S□LAJ-12 (XRNT□-12) high voltage current-limiting fuse. It can reliably break any current up to short-circuit current; the load switch breaks working current, the fuse breaks short-circuit current, and jointly breaks any overcurrent between working current and full short-circuit current. At the same time, the fuse opens the load switch through its striker.

Service Environment Conditions

• Ambient air temperature: upper limit +40degC, lower limit -25degC;
• Altitude: 1000m and below;
• Relative humidity: monthly average not greater than 90%, daily average not greater than 95%;
• Surrounding air shall be free from obvious pollution by corrosive or flammable gases, water vapor, etc.;
• No frequent violent movement;
• Pollution class: Class II.

If the service conditions exceed the above provisions, the user and manufacturer shall negotiate to determine.

Model and Designation

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Main Technical Parameters

Outline and Installation Dimensions

Ensure that FKN12-12D/630-20 High Voltage Load Switch FKN12-12D vacuum load switch before installation, check that the interrupter appearance has no cracks, contact wear does not exceed 3mm, auxiliary contact signals switch correctly after the operating mechanism stroke is in place, and the earthing blade opens/closes flexibly without jamming...