Mersen 9F60LJN312 Brand Introduction Mersen 9F60LJN312 is Amp-Trap 9F60 series R-rated medium voltage backup fuse developed by Mersen for medium voltage motor circuit short-circuit backup protection applications. It specializes in fast short-circuit current interruption for 5kV class motor starters, serving as ferrule type cylindrical fuse assembly for MCC medium voltage motor protection loops and power distribution cabinets.

Medium Voltage Backup Fuse is the core unit of Mersen 9F60LJN312. Medium Voltage Backup Fuse adopts ceramic tube housing, silver-plated copper ferrule terminals, rated voltage 5080VAC, 12R rating, interrupting capacity up to 50kA at 50/60Hz. Medium Voltage Backup Fuse is designed as backup protection for medium voltage motors, it will quickly melt and break the circuit when severe short-circuit fault occurs, coordinating with motor overload relays for full motor protection. This LJN style ferrule mounted fuse is non-indicating type, dimension 3 inch diameter, 15.97 inch overall length, fits standard MV fuse clip installation.

Mersen 9F60LJN312 provides stable Drive for workshop field medium voltage motor power protection control. Drive supports continuous rated operating current under 5.08kV power system. Drive features high breaking capacity and selective protection characteristic. Drive maintains stable performance during motor starting inrush current and only operates under fault short-circuit condition.

Mersen 9F60LJN312 features reliable Transmission for medium voltage incoming circuit and motor contactor devices. Transmission communicates via medium voltage power conductors. Transmission is fully compatible with Mersen medium voltage fuse holders and industrial power distribution automation systems. Transmission isolates short-circuit fault instantly to limit fault energy and protect medium voltage motors, contactors and upstream power equipment from destructive fault current damage.

Mersen 9F60LJN312 is widely used in water treatment medium voltage pumping stations, petrochemical MV motor loads, power plant auxiliary motors, mining medium voltage equipment and legacy medium voltage motor protection system renovation. With mature Mersen Amp-Trap medium voltage fuse technology, this MV fuse works within ambient temperature range -20~60℃ and has strong vibration resistance and thermal stability performance. It provides full lifecycle technical support including fuse clip installation, coordination check and after-sales maintenance, serving global users as a trusted 5080V 12R ferrule type medium voltage backup motor fuse solution.