Medium Voltage Fuses Selection

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Medium voltage fuses selection.

Capable to control full range of overload currents either in combination with switching apparatus or as sole protection. Their time current characteristics are designed to protect medium voltage distribution systems from transformer faults and low voltage faults upstream of lv protection devices. Cooper bussmann circuit protection. A similar method of fuse selection may be used as for direct on line starting see above but it must be noted that.

Medium voltage fuses medium voltage fuses worldwide circuit protection solutions cooper bussmann is a world leading supplier of medium voltage fuses. Selection guide for transformer primary fuses in medium voltage industrial commercial and institutional power systems s c power fuses types sm sml and smd 20 indoor and outdoor distribution 4 16 kv through 34 5 kv. The e rating defines the melting time current characteristic of the fuse and permits electrical interchangeability of fuses with the same e rating. Medium voltage current limiting and expulsion fuses suitable for the protection of distribution transformers voltage transformers capacitor banks motor circuits and installations with other switching apparatus.

For a general purpose fuse to have an e rating. 120816 1 of 10 medium voltage fuses 2 400 38 000 vac current limiting bolt in mount fuses description littelfuse offers a selection of e and r rated medium voltage fuses for the protection of transformers potential transformers feeders and motor circuits. Medium voltage fuses offer a much wider range of system voltages thereby resulting in a correspondingly large number of fuse voltage ratings. Selection guide s c el e c t ric c omp a ny s c power fuses types smd 1a smd 2b smd 2c smd 3 and smd 50 outdoor transmission 34 5 kv through 138 kv for transformer primary fuses in medium and high voltage utility and industrial substations.

Each product is backed by an efficient worldwide distribution network with unrivaled service and technical support. Low amperage e rated medium voltage fuses are gener al purpose current limiting fuses. Search results can be narrowed by selecting multiple attributes. Rms ka peak current ka 4 6 9 12 18 24 r.

Fuse selection medium voltage fuses used in mv lv substations are coordinated with the output rating of the transformer. R rated medium voltage fuses for motor circuits peak let through current curve 5 5kv and 2 75kv fuses 1 1 10 100 10 1 1 prospective current sym.