The FZW28-12F outdoor user boundary vacuum load break switch (abbreviated as “FFK”) is an outdoor pole-mounted distribution switchgear with a rated voltage of 12kV and a frequency of 50Hz. It utilizes vacuum arc extinction and SF6 gas for both ground and phase-to-phase insulation.
The main body of FFK is electrically connected to the FDR-01 fault detector through control cables and is used in conjunction with the front-stage relay. It features fault detection, control protection, and communication functions, enabling automatic disconnection of single-phase ground faults and automatic isolation of phase-tophase short circuits. FFK is suitable for installation at the responsibility boundary point where 10kV distribution line users enter or at the required Tjunctions. It cannot be installed and operated in series! FFK complies with technical standards such as GB3806-2004 and GB/T7261-2008.
Ambient condition
Altitude: ≤2000m;
Ambient Air Temperature: Upper limit +40°C, Lower limit -40°C;
Relative Air Humidity: Daily average not exceeding 95%, Monthly average not exceeding 90%;
Wind Pressure: ≤700Pa (equivalent to wind speed of 34m/s);
Pollution Level: IV (Creepage distance 31mm/kV);
Ice Thickness on Conductor: ≤10mm;
Seismic Intensity: ≤8 degrees;
Installation Location: Should be free from fire, explosion hazards, severe pollution, chemical corrosion, and strong vibrations；
Neutral Point Grounding Method: The neutral point is not grounded. The neutral point is grounded through the arc suppression coil, or the neutral point is grounded through low resistance.
