Cooper Bussmann LPS-RK-3-2/10SP Cartridge Time Delay Fuse RK1

Product Description

The COOPER BUSSMANN LPS-RK-3-2/10SP is a Class RK1 cartridge time delay fuse rated at 3.2 amps. It is designed for general-purpose overcurrent protection in industrial and commercial electrical systems. The fuse features a two-element construction that provides time delay characteristics, allowing temporary inrush currents to pass without nuisance tripping while still protecting against sustained overloads and short circuits. It measures 5 inches in overall length with a 20.6 mm diameter body. Interrupting capacity is rated at 100 kA DC and 300 kA AC (RMS). Licensed electricians install this fuse as part of panel, feeder, or branch circuit protection schemes.

This fuse is suited for use in fuse holders accepting Class RK1 cartridge fuses. Typical applications include motor branch circuit protection, industrial machinery, and commercial electrical distribution panels where time delay characteristics are required to ride through motor start inrush or transformer magnetizing currents. The non-indicating design is standard for installations where downstream monitoring equipment tracks fault events. This part is sold individually.

Key Features

• Class RK1 time delay cartridge fuse rated at 3.2 amps
• Two-element construction supports time delay operation for motor and transformer circuits
• High interrupting capacity: 100 kA at DC, 300 kA at AC (RMS)
• Overall length of 5 inches (127 mm) with 20.6 mm body diameter
• Non-indicating design for standard fuse holder installation
• CE Certified, CSA Certified (C22.2 No. 248.12, Class 1422-02, File 53787), and UL Listed (Guide JDDZ, File E4273)

Compatibility

Designed for use in fuse holders and disconnect switches rated for Class RK1 cartridge fuses. Verify that the fuse holder accepts the 5-inch cartridge body length and 20.6 mm diameter before installation.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit before removing or installing fuses. Use properly rated fuse pullers when handling cartridge fuses to avoid arc flash exposure. Confirm the fuse holder ampere and voltage ratings match the circuit requirements before installing.