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400E2C5.5 Datasheet(PDF) 1 Page - Littelfuse |
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400E2C5.5 Datasheet(HTML) 1 Page - Littelfuse |
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1 / 10 page  POWR-GARD® Fuse Datasheet littelfuse.com © 2014 Littelfuse POWR-GARD® Products Rev: 063014 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. Single, double, and triple barrel designs are available to cover a wide range of current, voltage, and interrupting ratings. Conventional ferrule type, clip lock, and bolt-in mounting configurations are available for virtually any application. Hermetically sealed fuses for use in hazardous environments are also offered. Contact the factory or your local Littelfuse representative for additional fuse ratings or custom mounting configurations. 24-Hour Emergency Service - Call 800-227-0029 Applications • Power Transformer Protection • Potential Transformer Protection • Motor Controller Back-up Protection • Fused Switches • Feeder Circuits General Information The terms “Medium Voltage” and “High Voltage” have been used interchangeably by many people to describe fuses operating above 600 volts. Technically speaking, medium voltage fuses are those intended for the voltage range from 2,400 to 38,000 Vac. High voltage fuses are for circuits carrying voltages greater than 38,000 Vac. E-rated fuses are considered to be general purpose fuses and can be used to protect against low and high values of fault current. R-rated fuses are designed for back-up protection. They must be used in series with other devices such as motor overload relays in order to achieve both overload and short-circuit protection. Medium voltage fuses are not intended to provide overload protection in the same sense as fuses rated 600 volts or less. Medium voltage fuse current ratings do not have the same meanings as the ampere ratings of low voltage fuses. All medium voltage fuses are limited in their ability to interrupt low value overcurrents, especially those between 100% and 200% of the fuse’s continuous current rating. They are designed to carry their rated current without exceeding the temperature rise permitted by NEMA and ANSI standards. Current-limiting E- and R-rated fuses are equipped with a mechanical indicator or striker pin that protrudes through the fuse cap upon operation of the fuse. This provides visual identification of a blown fuse and can be used as a trigger for external devices. Note: Extension distance 1/2” minimum; extension force 2 lb. minimum. |
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