Eaton Cooper Power Systems ELSP current-limiting backup fuse is an important component used in transformers to protect and isolate faulty equipment. This fuse is designed to be used in series with low current primary protection devices like Bay-O-Net fuse or MagneX interrupter.

The ELSP fuse is specifically designed to work in transformer oil, Envirotemp FR3 fluid, or an approved equivalent. Its highly efficient current-limiting section effectively minimizes the effects of high fault current stresses on equipment and the distribution system, making it an ideal choice for protecting transformers from overcurrent conditions.

This fuse has a minimum interrupting rating that is coordinated with that of a low current interrupter to avoid undesirable low current operation. However, its maximum interrupting rating is capable of clearing the highest fault currents likely to occur. Additionally, higher continuous current ratings can be achieved by connecting two fuses in parallel.

The ELSP fuse is an integral part of a two-part protection system that provides full range fault protection. The first part of the system provides low current protection with a replaceable expulsion fuse or resettable MagneX interrupter. The second part adds energy-limiting protection with a current-limiting fuse. These two protection components coordinate easily with upstream and downstream devices.

Overall, the Eaton’s Cooper Power Systems ELSP current-limiting backup fuse is an essential component for the protection of transformers against overcurrent conditions. Its efficient current-limiting section and compatibility with low current interrupters make it an ideal choice for protecting transformers in various applications.