RST 100-BULK

Fuses: RST 100-BULK application field and working principle

A fuse is a device that protects the wiring of an electrical circuit from unexpected or sudden surges in current. The RST 100-BULK fuses are multi-pole, dual-element fuses that combine two different ratings into a single device. They are primarily used in industrial and commercial applications, such as transformers, switchboards, and UPS systems. The 63 and 100 Amp ratings allow for more flexibility in circuit design and are key components in electronic and communications systems.

The RST 100-BULK fuse is constructed of a glass tube with a stainless steel shell and uses a ceramic guide for the other internal components. The ceramic guide supports two separate elements, which are connected in parallel. The primary element handles high current and is comprised of a wire that is electro-plated with a protective coating that melts when overloaded for protection. The secondary element is a smaller insulated wire that is made of the same material as the primary element. This wire is important because it provides additional protection from short-circuit conditions.

In addition, the RST 100-BULK fuse is designed with a slow blow characteristic, meaning that it will allow short duration surges of current without blowing. This feature increases the fuse’s reliability and helps eliminate nuisance trips. The fuse is UL listed and is available in both bulk and panel mount configurations. This makes it an ideal choice for industrial and commercial applications that are prone to transient conditions.

When the current in the protected circuit exceeds the rated value of either the primary or secondary elements, the energy produced by the current will cause the protective coating to melt, breaking the electrical connection. The elements are designed to react quickly to any excessive current before it damages the circuit, eliminating downtime and costly repairs. By utilizing two different elements, the RST 100-BULK fuse can offer both short-circuit and over-load protection, eliminating the need for extra components.

To replace a blown fuse, the technician must first identify the correct size and type of fuse for the application. The fuse must also be the correct amperage, voltage, and interrupt rating for the system. As with all fuses, special attention must be paid to the polarity of the fuse. If the fuse is not installed correctly, the circuit will not protect itself from overload or short-circuit conditions.

The RST 100-BULK fuse is a reliable and cost effective solution for protecting industrial and commercial circuits. The combination of the primary and secondary elements provides both overload and short-circuit protection, while the slow blow characteristic eliminates nuisance trips. The UL rating ensures the highest quality and reliability, while the panel mount and bulk configurations make it perfect for a wide range of applications.