045303.5NR

045303.5NR size fuses are designed and manufactured to suit general purpose protection. The 045303.5NR size fuse is mainly used in panel boards or fusible switches, depending on the application. The primary application for this fuse is in circuits with direct current voltage not exceeding 1000 volts.

Operating Principle

This type of fuse operates according to a thermal-magnetic principle. An internal thermal element is combined with a magnetic circuit. The thermal element is the element that ‘senses’ the current load in the circuit, and works by heating up at a rate proportional to the current passing through it. This heat causes a current carrying bimetallic strip to melt. When this strip melts the magnetic circuit is opened, thus removing the path for current to flow, thus dis-energizing the circuit.

Rating

The 045303.5NR size fuse is rated at 6A-100A. The rated voltage of this size is usually stated in the product catalog and is usually 1000V. The interrupting rating is 1000A at 1000V.

Construction

The 045303.5NR size fuse is a machine-wrapped element with a steel core tube that contains one continuous element. One end of the element is attached to one of the end caps. The other end is attached to the other end cap. There are two conductive metal plates (called bridges) which form the contacts for the no-load current.

Applications

The 045303.5NR size fuse is typically used to protect electrical circuits in panel boards or fusible switches. It can be used in many different electrical circuits, such as power distribution panels, control panels, motor starters, circuit breakers, transformers, solenoids and more. The 045303.5NR size fuse can also be used in AC and DC applications.

Advantages and Disadvantages

The 045303.5NR size fuse has many advantages. It is a cost-effective protection device, and it is also easy to install and maintain. Additionally, it helps to protect the integrity of the electrical system by providing a precise protection. Furthermore, the fuse will operate quickly in the event of an over-load or short circuit, providing safety and reliability.

However, since the 045303.5NR size fuse is a thermal-magnetic device, it is not as precise as other fuses. It also has a limited interrupting capacity, which means it may not be effective in very high current circuits. Also, since the fuse has to be replaced when it trips, it may be inconvenient to have to constantly replace it.