5CLE2-450X

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Fuses are essential components for any electrical system, with the purpose of protecting the most vital parts of the system in case of undesired electrical surges or down-voltages. The 5CLE2-450X fuse is a high current fuse designed for over-current and short-circuit protection in a wide range of applications. This article will discuss its application field and working principle.

Application Field and Characteristics

The 5CLE2-450X is designed for high currents in the range of 450A and 100V AC. It is suitable for use in medium-voltage switchgear, ring main units, and on-load tap-changers. The fuse is UL recognized for use as a type CC fuse, and CSA certified for use as a type G1 fuse. It also features a “Fast-Act” feature, which allows it to trip quickly in the event of an over-current or a short circuit.

The 5CLE2-450X is designed for use in environments where there is a risk of exposure to arcs and high temperatures. It is rated for up to 35kA at 440V AC, and its arc quenching characteristics have been tested against multiple kinds of circuits and types of load. It is designed for installation at the substation or in enclosed control cabinets, where it can provide protection against overloads and short circuits.

Design and Construction

The 5CLE2-450X is constructed of a zinc-plated steel enclosure around a fuse element. The fuse element consists of a silver-plated alloy wire embedded in a ceramic material. When power is applied to the fuse, the melting point of the alloy wire is reached, causing the element to melt and break the circuit. The fuse also contains an auxiliary release element, which will trip the fuse if the current exceeds the set point.

The fuse is designed with a snap-fit base, which allows for quick and easy installation. The base also contains two spring-loaded prongs, which ensure that the element is firmly held in place during installation and use. The fuse has two distinct modes: State Maximum and Minimum. In State Maximum, the fuse has a 215A hold current rating, and in State Minimum, the fuse has a 135A hold current rating. The fuse also has a response time of no more than 5 milliseconds, which ensures that the fuse will trip quickly in the event of an overcurrent or short-circuit.

Working Principle

The 5CLE2-450X is designed to protect against over-current and short-circuit conditions. When power is applied to the fuse, the current flowing through the fuse will heat the alloy element. If the current exceeds the set-point for either State Maximum or State Minimum, the element will melt, breaking the circuit and disconnecting the load from the supply.

The release element will also trip the fuse if the current exceeds the set-point. The release element consists of a bimetal strip, which will expand when exposed to high current levels. This expansion of the release element will trip the switch, breaking the connection and disconnecting the load from the power supply.

When the fault is cleared, the 5CLE2-450X will need to be replaced. Replacing the fuse is a simple process, as the base has been designed for quick and easy installation. The fuse is also designed for a wide range of applications, making it suitable for use in medium-voltage switchgear, ring main units, and on-load tap-changers.

Conclusion

The 5CLE2-450X is a high current fuse designed for use in medium-voltage switchgear, ring main units, and on-load tap-changers. It is rated for up to 35kA at 440V AC, and its arc quenching characteristics have been tested against multiple kinds of circuits and types of load. It is UL recognized for use as a type CC fuse, and CSA certified for use as a type G1 fuse.

The fuse is designed to protect against over-current and short-circuit conditions, and its release element will trip the switch if the current exceeds the set-point. It is easy to install and replace, making it suitable for a wide range of applications. It is a reliable and cost-efficient solution for providing protection to electrical systems.

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