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Medium voltage fuses and cutouts

MV fuses up to 40.5 kV, commonly known as high voltage fuses, provide main or back-up protection against overload and overcurrents.

ABB offers both current limiting and expulsion (non-current limiting) fuses for medium voltage systems. Fuses are tested according to IEC or ANSI standards, depending on design and market preferences. Two housing materials are applicable – porcelain and resin-fiberglass. Both of them are characterized by high mechanical and thermal resistance.

ABB fuses have a special design for each application and are suitable for the protection of distribution transformers (current and non- current limiting), voltage transformers (current limiting only), capacitor banks (current limiting and expulsion), motor circuits (current limiting only) and cutouts (non-current limiting only).

The fuses can operate as sole devices or can be combined with air insulated and SF6-insulated switch disconnectors.

Why ABB?

  • Wide application experience coming from designing of protection in medium voltage systems
  • Coordination with ABB products where fuses are applicable (air and SF6 insulated switchgear with load break switches, distribution transformers and contactors)
  • Extensive knowledge for recommending optimal protection arrangement with special attention to safety and reliability

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