Learn more about Medium Voltage Fuses
Learn more about Medium Voltage Fuses
Medium voltage fuses are used as protection devices in medium voltage switchgear. Their great advantage is the very fast current limiting operation in the event of short circuit failures. MV fuses are defined as fuses with a voltage rating greater than 1,500V and less than or equal to 36,000V (36kV). They are commonly used for the protection of distribution transformers, motor circuits, capacitor banks, voltage transformers & cable feeders.
The most common styles in Australia & NZ are DIN style, British Standard Air and British Standard Oil type. MV fuses are available in three IEC performance categories: Back Up, General Purpose and Full Range.
DIN Back Up fuses
The DIN design is the most popular style of MV fuse used in the world. Originally designed in Germany, DIN fuses became the default fuses used in electrical systems in Europe and now are a global reference. DIN fuses are available with the back up performance characteristic.
DIN General Purpose fuses
The DIN design is the most popular style of MV fuse used in the world. Originally designed in Germany, DIN fuses became the default fuses used in electrical systems in Europe and now are a global reference. DIN fuses are available with the general purpose performance characteristic.
DIN Full Range fuses
The DIN design is the most popular style of MV fuse used in the world. Originally designed in Germany, DIN fuses became the default fuses used in electrical systems in Europe and now are a global reference. DIN fuses are available with the full range performance characteristic.
British Standard Oil fuses
British standard oil fuses are back up fuses used in oil filled switchgear. Theses fuses comply with IEC 60282-1, BS 269-1 and ESI 12-8. To successfully operate in an oil immersion environment, these fuses are specially designed to be oil-tight under pressure and to possess the unique mechanical properties required for use in oil filled switchgear.
Motor Protection fuses
Motor protection fuses are specially designed for use in a motor circuit (according to IEC 60644) and are available in DIN standard and British Standard design, providing great choice and flexibility to designers of switchboard panels. These fuses provide high reliability against cyclic and peak current loads and incorporate age resistant technology needed to cope with high motor start-up currents. They also feature low power losses thus minimising temperature increases in narrow contactor enclosures and ow minimum interrupting currents for operation of over-currents in the range 3 - 3.5 x rated current. An important unique feature is the SIBA temperature limiter function protects switchgear against excessive temperature rises.
VT Protection fuses
VT Protection fuses are characterised by relatively small value current ratings and are exclusively used for the protection of voltage transformers. VT fuses are available with the back up performance characteristic.
Fuse Clips and Holders for MV fuses
A broad selection of indoor bases, outdoor bases, fuse clips, extension adapters and micro-switch fittings are available for MV fuses.