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-to- phase short circuits.
FFK is suitable for installation at the responsibility boundary point where 10kV distribution line users enter or at the required T- junctions. It cannot be installed and operated in series! FFK complies with technical standards such as GB3806-2004 and GB/T7261-2008.