11150 Circuit Protection

Series:	*
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Mounting Type:	Through Hole
Package / Case:	Fuse Link
Size / Dimension:	5.394" L x 0.748" W (137.00mm x 19.00mm)

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Introduction

Electrical fuses are essential safety devices that are used to protect electrical circuits or systems from damage or catastrophic failure. Fuses vary in size, design and application. They are designed to “condition” abnormal current or voltage conditions, and in many cases, to quickly blow and disconnect an electrical circuit from potential harm. This article will provide an overview of one type of fuse technology, the 11150 Series Fuse, exploring its application field and working principle.

Applications

The 11150 Series Fuse, manufactured and sold by Cooper Bussmann, is especially suited for applications with high inrush currents and phase-shifting power supply systems. These fuses are especially designed to handle short-term inrush currents up to 2400 Amps for each 120VAC phase. They are also well-suited for applications with multiple power supply phases that remain “in-phase” with one another while under load. In addition, the 11150 Series Fuse is particularly well-suited for applications like residential air conditioners, microwave ovens, humidifiers, air purifiers, high-efficiency motors, and industrial process heaters. These all require precise protection from short-term, potentially damaging inrush currents.

Design

The Cooper Bussmann 11150 Series Fuse is a single-pole, non-vented, fast-acting, time-delay fuse, specifically designed for use with copper conductors. The fuse includes a unique spring contact design that allows for a secure mechanical termination without the need for compression lugs. This allows technicians to install the fuse with an approved torque wrench, without worrying about the security of the mechanical connection. In addition, this contact design allows technicians to perform repair work on the circuit without the need to replace the fuse.

Construction and Operation

The 11150 Series Fuse consists of a cylindrical body filled with an internal ceramic insulator. The body has two electrical pins, each attached to a ferrule and set into the ceramic insulator. The outer housing of the fuse is made of an alloy of aluminum and zinc, which helps to dissipate any heat generated by the fuse. An encapsulated wire clip is then attached to the ferrule and the two electrical pins to provide electrical continuity to the fuse. The internal design of the 11150 Series Fuse consists of a ferrite core and a thin sheet metal ribbon which acts as the fuse element. This fuse element is designed to melt at a set current rating, quickly breaking the circuit and providing fast-acting protection from potentially damaging inrush currents. The fuses are available in current ratings ranging from 20 Amps to 200 Amps.

Conclusion

Cooper Bussman\'s 11150 Series Fuse is an ideal solution for protecting electrical circuits and systems from potentially damaging short-term inrush currents. It is highly reliable, and is well-suited for applications in residential air conditioners, microwave ovens, humidifiers, air purifiers, high-efficiency motors, and industrial process heaters. The unique design makes installation easier and more secure, and allows for simple repair work without having to replace the fuse.

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