General The FW-24 Outdoor Load Break Switch (On load isolator) contained in the list are used for the switching of feeder lines and ring main units or transformer feeders. FW-24DR Outdoor Load Break Switch-Fuse Combinations are combined with XRNT fuse, with tripping arrangement or with indication for short circuit protection for switching under off load conditions.
Features: Hot dip galvanized switch shafts and base frames made of profiled steel. Arrangement of the switch shafts in maintenance free bearings. Hard porcelain/Silicon rubber insulators are used. Nickel plated electrolytic copper current paths. Arc quenching medium of very low weight synthetic material, quenching by evaporation according to the hard gas principle. XRNT fuses rating upto 36kV, breaking capacity 63kA. Elimination of gun powder and fire hazards by using mechanically operated striker pin in fuse. Tripping force is 120kN. Drop-out fuses can be supplied instead of XRNT fuses.
The switches are produced in six modules: 1. For Vertical installation. 2. For Horizontal installation on lattice towers, concrete or on wooden towers 3. Without fuses 4. In connection with XRNT fuses with tripping arrangement & with making capacity 5. In connection with XRNT fuses with tripping indication only 6. In connection with Drop-Out fuses.
The Load Break Switch complies with IEC 60265, VDE 0670 part 3. The fuses comply with IEC 60282 and ANSI specification.