FNM-4-1/2

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The FNM-4-1/2 is a specialty fuse produced by Ferraz Shawmut. It is an electrical fuse used in numerous applications and is designed with a specific working principle that can be understood by examining its design and typical uses.

The FNM-4-1/2 is typically used in medium-voltage applications ranging from 600 to 41,000 volts. These fuses are designed to protect equipment and systems from both accidental and sustained overcurrent conditions. When the fuse detects an overcurrent, the fuse element melts and opens the circuit, which prevents excessive current from causing structural and material damages to the system.

The FNM-4-1/2 has a unique design that is beneficial for several types of applications. Its thermal-magnetic design allows it to offer a short-circuit current protection in the range of 350-400A. The fuse element is designed with a high degree of interruption capacity and its power interrupting characteristics meet the UL and IEC requirements. The FNM-4-1/2 also has an overcurrent release, which helps to protect the equipment in the case of sustained overload. The fuse also includes a feature that limits the motor starting current, which helps to reduce the effects of inrush on the system.

The FNM-4-1/2\'s working principle is based on the melting of the fuse element when it detects an overcurrent. The fuse element is made of a metal alloy that has a low melting point and is able to melt quickly in the event of an overcurrent. When the fuse element melts, the circuit is opened and the system is protected from damage. The fuse element will also open quickly to protect the system from sustained overcurrents.

The FNM-4-1/2 is an important electrical component for numerous applications. The fuse\'s unique design helps to provide a high level of protection from both accidental and sustained overcurrents. The fuse element also has a low melting point which makes it able to open quickly and effectively protect the system. The fuse also includes a feature that protects the system from starting currents while still offering protection from short-circuits.

The FNM-4-1/2 is a versatile electrical component that is designed with a specific working principle. This fuse is designed to be used in applications with medium-voltage ranging from 600-41,000 volts. Its thermal-magnetic design helps protect the system from both accidental and sustained overcurrents while its overcurrent release helps to limit motor starting currents. In the event of an overcurrent, the fuse element melts and quickly opens the circuit, providing effective protection from overcurrents.

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