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5NLE-25E Datasheet(PDF) 1 Page - Littelfuse |
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5NLE-25E Datasheet(HTML) 1 Page - Littelfuse |
1 / 12 page 61 Medium Voltage Fuses 2400 - 25,500 VAC s Current Limiting Littelfuse now offers a complete selection of “E” and “R” rated medium voltage fuses for the protection of trans- formers, 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 now 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 is available. Call 1-800-227-0029. APPLICATIONS s Power Transformer Protection s Potential Transformer Protection s Motor Controller Back-up Protection s Fused Switches s 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 pro- tection. 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 inter- rupt 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. Additional application data can be found in the Fuse Application section of the POWR-GARD Products catalog (PF101). 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. Bolt-in Mount Fuses Next |
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