919578

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Fuses are an important component of electrical systems and are used in industrial, commercial, and residential applications. The 919578 fuse is a dual element, non-restrictive, fully submersible time-delay fuse. It is designed to protect AC motors and non-inductive loads. In this article we will discuss the application fields and working principle of the 919578 fuse.

Application Fields

The 919578 fuse is used in applications for AC motors, as well as in non-inductive loads. These include pumps, HVAC, and industrial applications. It can also be used for short-circuit and overload protection of motors, transformers, air conditioning plants, distribution boards, and outlets. The fuse is designed for the protection of single phase motors, featuring time-delay, low let-through, and high breaking capacity.

Working Principle

The 919578 fuse consists of two elements: a time-lag element and a current element. The time-lag element is a current-sensing device, which reacts to temporary overloads, starting the timer. The current element is a current-sensing device that holds the timer steady and limits the current. The time-lag element will delay the operation of the fuse and avoid nuisance tripping. The current element will ensure that when the overload if beyond the rating of the fuse, the fuse will trip not exceeding the rated let-through current.

The 919578 fuse works by detecting current passing through the fuse. If the current exceeding the fuse rating is detected, the fuse will trip. This process is known as thermal runaway, where the current element will start to heat up the fuse element, causing it to melt and interrupting the circuit. The melting of the element causes an arc and results in a high voltage spike, which will degrade the fuse and the circuit.

The 919578 fuse has several advantages over other fuses. It is fast-acting and can be reset easily. In addition, the current element is adjustable and allows the user to set the trip current to a specific value. The 919578 fuse is also non-restrictive, meaning that it can be used in any AC circuit.

The 919578 fuse is a reliable and efficient tool for protecting AC motors and non-inductive loads. It is a cost-effective solution for short-circuit and overload protection. With its adjustable current element and fast-acting trip time, the 919578 fuse is an ideal solution for a wide range of applications.

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