2JS 2-R

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Fuses are safety components that act to protect components or entire circuits in a system from being exposed to excessive current levels. This is achieved by breaking the circuit if the current across it exceeds a predetermined value, referred to as the trip current. After the current decreases to a predetermined safe value, the fuse will re-establish the electrical connections. The most widely used type of fuse available on the market is the 2JS and 2-R Fuses. This article outlines the various applications for which the 2JS and 2-R Fuses are suitable and their respective working principles.

Applications of the 2JS and 2-R Fuses

The 2JS and 2-R Fuses are designed for circuit protection applications in homes, public utilities, commercial premises, industrial plants, petrochemical facilities, and gas and oil refineries. These fuses are used to protect lines carrying relatively low current (2 - 1000A) and are suitable for single and three phase AC power circuits with currents between 10 - 1000 A. The 2-R Fuses are ideal for installations in closely drawing electrical cars, trucks, buses and marine applications. They are also used in railway and solar power systems, as well as for protection of incandescent and fluorescent-type lighting.

Working principles of the 2JS and 2-R Fuses

The 2JS and 2-R Fuses have a rectangular-shaped body and contacts. The body is made from a semiconductor material called silicon rubber, which is characterized by its excellent insulation performance. It is an oxygen-free material that provides high moisture resistance and superior insulation performance, thus providing excellent protection for the electrical system. The contacts are made from tin-plated copper alloy, which ensures reliable electrical connection. The contact surfaces are designed to reliably make and break the electrical connections several times.

The 2JS and 2-R Fuses are capable of disconnecting the electrical circuit in the event of an overload or short circuit. When the continuous current flows through the fuse exceeds the rated current of the fuse, it causes the fuse element to heat up and melt, thereby breaking the electrical circuit and protecting the electrical system from potentially damaging conditions.Once the current drops to a safe level, it resets automatically. This resetting feature is made possible due to a bimetal spring covered by the fuse element that immediately recloses the electrical connections as soon as the current drops back down to a safe level.

In addition, the 2JS and 2-R Fuses are vandal-proof and housed in an ABS box, making them an ideal choice for outdoor applications. They can also be used in conjunction with a circuit breaker, providing additional protection for the electrical system.

Conclusion

The 2JS and 2-R Fuses provide a reliable and cost-effective solution for protecting electrical circuits from potential damage due to excessive current levels. They are suitable for a wide range of applications requiring single and three phase AC power circuits with current between 10 – 1000A. Furthermore, their vandal-proof construction and automatic resetting feature make them ideal for outdoor applications. Therefore, the 2JS and 2-R Fuses are a perfect choice for those looking for reliable and affordable circuit protection solutions.

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