S&C Electric Company 132030R4 Fuse Refill Unit

The S&C Electric Company 132030R4 SM-5 fuse refill unit is a standard-speed replacement module for SM-5 fuse holders used in high-voltage distribution equipment. It is rated for 14.4 kV nominal operation with a maximum of 17.0 kV and carries a 20E continuous current rating. Specifically designed for use in SM-5 holders, the 132030R4 serves as a refill element to replace a blown unit and maintain coordination with adjacent protective devices in metal-enclosed switchgear and related distribution gear. For refill units rated 10E through 400E amperes, the fuse elements are silver and helically coiled, with solderless construction. In accordance with standard testing, the minimum melting current is not less than 200% of the refill-unit rating, ensuring reliable operation within protection schemes. Catalog number 132030R4 identifies this standard-speed refill in S&C’s SM-5 family, and its 14.4 kV nominal rating makes it suitable for systems designed for 14.4 kV distribution networks. This refill unit is used when one or more SM-5 refills have blown, restoring service without replacing the entire fuse assembly, and it is compatible with SM-5 holders in applicable metal-enclosed switchgear.