FNQ-R-2-1/2

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The FNQ-R-2-1/2 is a type of specialty fuse widely used for the electrical system protection of motors, transformers, generators, and other types of electrical power equipment. This type of fuse is rated for either 30 amperes or 60 amperes of current and is designed to open when exposed to severe currents, and thus protecting the circuit’s sensitive components from power surges or overloads.

This type of fuse can be further classified into two categories, the time delay fuse and the fast-acting fuse. The time delay fuse is designed to open after a set time period, which is determined by the nominal current of the circuit. The fast-acting fuse is designed to open instantaneously when exposed to severe currents.

An FNQ-R-2-1/2 fuse is composed of three main parts: the outer casing, the internal fuse element, and the arc-quenching device. The outer casing of the fuse is typically made of inert, non-flammable material such as resin, ceramic, or thermoplastic. This reduces the danger of fire caused by the fuse itself. The internal fuse element is also made of a non-flammable material. It is designed to open or melt when the current through the circuit exceeds the fuse rating.

The arc-quenching device is designed to effectively quench any overcurrent arc, in order to prevent accidental fires and explosions. It is usually composed of a ferrule/brass paddle and a resistor, which helps to reduce the intensity of the electric current. In addition, the arc-quenching device also helps to prevent any unintentional fuses from being damaged.

The working principle of the FNQ-R-2-1/2 fuse is simple. When the current through the circuit exceeds the fuse rating, the fuse element melts due to the heat produced by the overcurrent. This causes the contacts of the fuse to separate, which in turn opens the circuit, thus preventing any further electrical damage due to the overcurrent. The arc-quenching device helps to reduce any spark or explosion that might occur due to the opening of the circuit.

FNQ-R-2-1/2 fuses are mainly used as protection devices in electrical systems of motors, generators, transformers, and other types of power equipment. They are highly reliable and provide an effective and safe solution to protect these important electrical systems from power surges and overloads. They are also designed to be easy to install and replace, which saves valuable time and labor for the user.

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