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OPAL020.X Fuses: Application Field and Working Principle

Fuses are widely used as a safety device in various types of electrical and electronic circuits. OPAL020.X series fuses by Littelfuse are the current-limiting fuses that specifically designed to offer over-current protection for higher-energy AC motors and transformers. They are applicable even in applications with high inrush of current. In this article, we will explore the application field and the working principle of these fuses.

Application Field

OPAL020.X fuses are ideal for applications that require over-current protection in medium and large industrial AC motors, as well as in transformers. They are especially suitable for electric traction circuits and lightning apparatuses, providing reliable protection and quick response. The dimensions of these fuses make them well suited for use in house distribution cabinets, and they offer several benefits such as a protection from high levels of over-current, no deterioration of the contact surfaces, and an enhanced trip action with a wide voltage range.

Working Principle

The OPAL020.X fuses offer current limitation performance as a result of the combination of two technologies. The first technology utilizes overload relays or other devices, which monitor the current of the device, and the second technology utilizes the fuses, which act as a conductor in normal operating conditions, and an open-circuit device when the current goes above the set value. The combination of these two technologies allows the OPAL020.X to provide effective protection against over-currents.

When an over-current occurs, the overload relay will detect the increase in current and de-energize the circuit. As soon as the current goes beyond the set value, the fuses will heat up and melt to break the circuit, disabling the current further. This is the working principle of the OPAL020.X fuses, which are specifically designed to provide a particularly effective over-current protection in various electrical and electronic circuits.

Conclusion

In conclusion, OPAL020.X fuses provide an effective and reliable protection from over-currents in various medium and large industrial AC motors and transformers. With their wide voltage range, they offer a quick trip action and no deterioration of the contact surfaces, making them an excellent choice when searching for a cost-effective and reliable over-current protection solution.

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