03221.25H

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Fuses

Fuses are electrical protection devices that are designed to melt and interrupt the circuit when the set fuse overcurrent threshold is exceeded. Fuse curves are designed for the specific application and working condition. It is important to understand the fuse ratings, fuse classes, circuit parameters, and operating conditions to choose the correct fuse for a given application.

03221.25H Application Field and Working Principle

The 03221.25H is a medium-voltage fuse designed for applications ranging from AC circuits up to 600 volts. It is particularly suitable for applications such as capacitor banks, motor start circuits, and other medium-voltage loads. This fuse design features a ferrule body with a cylindrical ceramic sleeve and a porcelain end caps. It is capable of handling rated currents between 16 and 63 amps.

The 03221.25H fuse operates by melting the conductor in the center of the ferrule when excessively high current passes through the fuse. As the fusible element melts, the provided spring forces the contact fingers to open and consequently trips the circuit. Also, as the fuse operates, a small explosion of the porcelain end caps is tried.

The main advantages of the 03221.25H fuse are its excellent melting time-current characteristics, high flow-current capacity, good electrical strength, mechanical operations, and small size. It is also corrosion-resistant, flame-retardant, and dust-proof, making it safe to use in a variety of applications. The fuse also has a relatively long operating life and is easier to maintain than other types of fuses.

The 03221.25H fuse can be used in a variety of applications. It is suitable for use in undervoltage and reclosing protection, motor starting and load control, capacitor or thermistor protection, capacitor switching circuits, and other typical circuit protection applications. It can also be used in residential, commercial, and industrial maintenance applications.

When selecting a fuse, it is important to consider the application and expected operating conditions. Different fuses are designed for different maximum currents and levels of protection. The 03221.25H fuse is a general-purpose fuse designed for use in medium-voltage applications, but it should only be used in circuits with continuous current ratings up to 63 amps. In addition, it should only be used in applications that require a current that does not exceed the Maximum Interrupt Rating (MIR) of 10,000 amps.

The 03221.25H fuse offers superior protection for a wide variety of medium-voltage applications. It can handle current up to 63 amps and has an MIR of up to 10,000 amps, making it suitable for a wide range of applications. In addition, it is relatively easy to maintain and has a long operating life. For these reasons, the 03221.25H fuse is suited for use in residential, commercial, and industrial maintenance circuits.

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