JLLN025.T

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JLLN025.T Application Field and Working Principle

The dual element time-delay Class J fuses, JLLN025.T, are applying in the area of electricity and specialty fuses. These fuses provide a high level of protection, improved line protection, and increased current-limiting characteristics.

The JLLN025.T features a dual element design that provides superior current-limiting characteristics to decrease on-state arcing levels. This fused circuit disconnects the circuit for the time it is specified when an overload or short circuit occurs. Thus, it helps protect the load and reduce the chance of arc-fault events. With the dual element design, the fuse will disconnect the circuit in just few milliseconds, opening the circuit faster than other fuse technologies. It allows circuit designers to increase circuit-loading capabilities while still offering reliable protection.

Working Principle

This fuse is composed of two fuses, a primary and a second fuse. The primary fuse will respond quickly to an overload, and the second fuse will respond faster to a short circuit and help to limit the arcing. The fuse will open the circuit when there is an overload or short circuit. The mechanism behind this principle is that the fuse disables or disconnects the power to the circuit to protect it against any overload or short.

When an overload or short circuit occurs, the primary fuse will respond quickly to the current overload by melting the fuse element. This causes the current to be cut off from the circuit, preventing further damage. Then, the secondary fuse will trip in order to further cut off all power from the circuit or reduce the arcing in the fuse holder to prevent damage to the fuse holder.

The JLLN025.T fuse is suitable for higher continuous short circuit currents and with a short circuit current rating up to 200kA, this allows for faster, more reliable and more effective protection of the load in all high-power applications. The fuse also features an advanced mechanical latch design which prevents false tripping and ensures secure long-term operation.

Applications

The dual element time-delay Class J fuses, JLLN025.T, offers high-level performance in the area of electricity and specialty fuses. Its dual element design makes it well-suited for use in both industrial-grade and consumer-grade applications such as refrigeration, air conditioning, compressors, electric motors, alternators, primary protection, and more.

The JLLN025.T fuse is also designed for protection of high-current and high-voltage applications including transformers, arc furnaces, DC drives, switchgear, and other heavy-duty, high-power applications. It is compatible with popular fuse blocks and offers protection against overcurrents, overvoltage, undervoltage, short-circuit, and other conditions.

Conclusion

The JLLN025.T dual element time-delay Class J fuse provides superior protection in a wide range of application areas, from consumer-grade to industrial-grade. By combining a primary fuse and secondary fuse design, it offers increased current-limiting capabilities, improved line protection, and quicker response time against overloads or short circuits. Its high short-circuit current rating, advanced mechanical latch design, and compatibility with popular fuse blocks make it an ideal choice for high-power and high-current applications.

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