3557-2

Fuseholders

Fuseholders are an integral part of any electrical system because they provide a way for a fuse to be connected into the circuit. The purpose of a fuse is to provide over-current protection, and it is important that the fuseholder is properly designed and rated to ensure that it can safely and reliably hold a fuse and respond appropriately when an over-current condition occurs. There are a wide variety of fuseholders available to suit different applications, and understanding the differences between them can help engineers select the most appropriate fuse for the application.

3557-2 Application Field and Working Principle

The 3557-2 fuseholder is a current-limiting fuseholder designed for use with Class R ferrule fuses up to 20A. This type of fuseholder is suitable for most standard commercial and industrial applications, in particular for motors, transformers, and lighting systems. The fuseholder has an 18AWG wire conductor that can be terminated in a range of standard connection types, including ring terminals, spade connectors, and so on. When properly installed, the 3557-2 fuseholder has a current rating of up to 20A.

The working principle of the 3557-2 fuseholder is relatively simple. When the current in the circuit exceeds the rated value of the fuse, the fuse heats up due to the increased current and this causes a portion of the fuse to vaporize. This vaporization conducts the heat away from the fuse element, and the fuse is thus ‘blown’, opening the circuit and preventing excessive current from flowing through the circuit.

In addition, the 3557-2 fuseholder can be used in conjunction with a fuse tester to test the continuity of the circuit. This is done by connecting a suitable fuse tester to the terminals of the fuseholder, and then applying a suitable voltage across the test terminals. If the continuity is verified, the tester will indicate when the fuse is blown, allowing engineers to quickly and easily check the integrity of the circuit and replace any defective fuses, if necessary.

Conclusion

The 3557-2 fuseholder is a versatile and cost-effective solution for protecting electrical circuits from excessive current. It is easy to install and is suitable for most standard commercial and industrial applications. Furthermore, the fuseholder can be used in conjunction with an appropriate fuse tester to quickly and easily test the continuity of the circuit. As such, the 3557-2 fuseholder is an ideal choice for protecting electrical circuits from over-current conditions.