Medium Voltage Transformer Fuse Selection

Fuses can be sized on the transformer primary and or secondary rated at 125 of the transformer f l a.

Medium voltage transformer fuse selection.

Fuse selection medium voltage fuses used in mv lv substations are coordinated with the output rating of the transformer. 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. There is a wide amp rating selection in the 0 to 15a range for these dual element. Calculate size of circuit breaker or fuse on primary and secondary side of transformer having following detail transformer details p 1000kva primary voltage vp 11000 volt secondary voltage vs 430 volt transformer impedance 5 transformer connection delta star transformer is in unsupervised condition.

Medium voltage fuses offer a much wider range of system voltages thereby resulting in a correspondingly large number of fuse voltage ratings. Capable to control full range of overload currents either in combination with switching apparatus or as sole protection. Features open construction with encapsulated coil 60 kv bil csa c22 2 47 m90 66 1988 and c9 02 ul ansi c57 13 2 fuse kits available as add on. 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.

For questions contact our technical support and engineering services group at 800 tec fuse 800 832 3873. Their time current characteristics are designed to protect medium voltage distribution systems from transformer faults and low voltage faults upstream of lv protection devices. Select from the available attributes to find a fuse s that meets your application s criteria. Transformers having primary voltage ratings between 34 5 kv and 138 kv with medium voltage 4 16 kv through 34 5 kv secondaries will be covered.

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. These dual element fuses have sufficient time delay to withstand the high magnetizing inrush currents of transformers. Temco medium voltage control power transformers cpt are used to supply power to control circuit in electrical panels. Search results can be narrowed by selecting multiple attributes.

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