Cooper Bussmann LPS-RK-60SP RK1 Cartridge Fuse 60A

Product Description

The COOPER BUSSMANN LPS-RK-60SP is a Class RK1 cartridge-style time delay fuse rated at 60 amps. It is designed for general-purpose overcurrent protection in industrial and commercial electrical systems. The dual-element, time delay construction allows the fuse to ride through brief motor-starting inrush currents without nuisance opening, while still providing fast, reliable protection against sustained overloads and short-circuit faults. Electricians and electrical contractors install this fuse in fused disconnect switches, panelboards, and motor branch circuits where Class RK1 rejection-style protection is required. The fuse measures 5.5 inches in overall length with a 27 mm diameter body.

This fuse is suited for use in motor branch circuits, feeder circuits, and load-center applications in commercial and light industrial settings where Class RK1 time delay fusing is specified. Its rejection-style ferrule design physically prevents installation in fuse holders rated for lower interrupt classes, ensuring the correct protection level is maintained in the field. It is a common fit for fused safety switches, combination starters, and other Class RK1-rated fuse holders.

Key Features

• Class RK1 time delay design handles motor inrush without nuisance trips
• Dual-element construction provides both overload and short-circuit protection
• 100 kA interrupt rating at DC; 300 kA interrupt rating at AC (RMS)
• Non-indicating fuse body — no visual blown indicator
• Rejection-style cartridge prevents substitution with lower-rated fuse classes
• CE Certified, CSA Certified (CSA C22.2 No. 248.12), and UL Listed (Guide JDDZ File E4273)

Compatibility

Designed for use in Class RK1-rated fuse holders and fused disconnect switches accepting cartridge fuses with a 27 mm diameter body and 5.5 inch overall length.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the circuit at the upstream disconnect before removing or installing fuses. Use insulated fuse pullers rated for the voltage of the circuit. Never replace a Class RK1 fuse with a lower-class or higher-amperage fuse, as this compromises the protection coordination of the circuit.