IEC outdoor transformer fuse CEF
MV outdoor current limiting fuses up to 40,5 kV and fuse-links up to 26 kV protect distribution transformers, capacitors banks, cable feeders and overhead lines against short-circuit consequences.
CEF fuses current limiting are of back-up type. They have a zone between the minimum melting current and the minimum breaking current where the fuse links may fail to interrupt and this zone is very narrow.
CEF-OT fuse-links were designed specially to be used in combination with TPC bushing and TPC II switch-disconnector, which are used in ABB’s TPC distribution transformers. The design of fuse-links provides resistance to high temperatures and vacuum during transformers manufacturing process. They can work inside a transformer tank, immersed in transformer oil at temperatures from -40°C to +80°C, in outdoor and indoor installations, at temperatures from -40°C to +40°C, or inside a TPC bushing.
- Low minimum breaking current, low power losses and low electric arc voltage
- High breaking capacity and high short-circuit current limiting capacity
- Adopted for using in combination with switch disconnector