The Cooper Power Systems ELSP Current-limiting Backup Fuse is used in series with low current primary protection devices such as a Bay-O-Net Fuse or MagneX® Interrupter. The ELSP fuse is designed for use in transformer oil, Envirotemp® FR3® fluid, or an approved equivalent.
The fuse’s highly efficient currentlimiting section minimizes the effects of high fault current stresses on equipment and the distribution system. Its minimum interrupting rating is coordinated with that of a low current interrupter to avoid undesirable low current peration; yet its maximum interrupting rating will clear the highest fault currents likely to occur. Higher continuous current ratings can be achieved by connecting two fuses in parallel.