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FLSR600.XXID Application Field And Working Principle

The FLSR600.XXID is a line of electrical specialty fuses manufactured by S&C Electric Company. Specifically, they are designed for medium voltage circuits such as those found in utility, industrial, and commercial applications. The fuse is ideal for use in switchgear, via fuses, line protectors, etc. The fuse meets the requirements for medium voltage fuse applications as listed by UL and CSA.

Specifications and Features

The FLSR600.XXID is available in a variety of interrupting ratings, time-delay ratings, and at 600 Volts. It also comes in two sizes; the FLSR600-1XXID and the FLSR600-2XXID. This fuse has a current rating up to 600 amps and a short time current rating of up to 40,000 Amps. Its melting I²t rating is 1.7 times the rated current. The fuse is also available with a HgW enclosure to help protect it from environmental elements such as dust and moisture. Additionally, the HgW enclosure meets UL and IEC Ex hazardous location standards. Furthermore, the FLSR600.XXID is available with a NRTL-approved indication plug option.

Working Principle

The FLSR600.XXID works by providing a short-circuit protection by absorbing large amounts of current in a few milliseconds when a fault in the circuit occurs. Because of their melting I²t rating, they are able to absorb even more current. The fuse mainly consists of two elements; a fuse element and an operating element. The fuse element is an electrode located in the center of the fuse that melts when excessive current is detected. The operating element is an external spring-loaded plunger that causes the fuse element to compress and break when fault current is present and becomes too large.

Other Features

Another key feature of the FLSR600.XXID is its dielectric strength. The fuse is rated at a minimum of 25 kV, which is many times higher than the actual operating voltage. This helps ensure that the fuse does not become damaged by transient voltages. Additionally, the FLSR600.XXID has a high contact resistance during normal operations. This reduces the possibility of arcing in the fuse, which can lead to premature fuse failure. The fuse also has a high degree of flexibility when it comes to mounting it in a panel or with clips. It can be mounted in either a vertical or horizontal orientation and can be connected with either threaded, tubular or bolted connections.

Conclusion

The FLSR600.XXID is an excellent choice for medium voltage applications such as utility, industrial, and commercial applications. It offers fast operation and flexibility for the installation and has a high dielectric strength, low contact resistance, and high melting I²t rating for optimal performance. It is also UL- and CSA-listed and can be used in hazardous locations with the optional HgW enclosure.

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