0438004.WRA

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Introduction to 0438004.WRA

0438004.WRA is a type of fuse designed and manufactured by Mersen, a leading global expert in electrical power and advanced materials. It is a medium-voltage load-interrupting air fuses, designed for both indoor and outdoor, pole-mounted applications up to 15 kV.

Application Field and Working Principle of 0438004.WRA

Application Field

0438004.WRA is designed as an economical fuse solution for medium voltage, load-interrupting applications such as overhead, pole-mounted secondary distribution, and secondary metering. These fuses are ideally suited for outdoor installations due to their efficient one-piece, open-fused designs. The seal of the 0438004.WRA is sealed with a pressure-sensitive sealed tape to keep moisture and dust out, preventing current leakage. The resistance of the fuse body structure ensures long-term stability and performance.

Working Principle

0438004.WRA are designed to interrupt fault currents and to protect medium-voltage equipment from overloads and short circuits. The fuse body consists of several meltable elements that are placed between the terminals, forming a closed loop. When a fault situation occurs, the current passing through the fuse body will heat the elements, melting them in a few milliseconds. This interrupts the fault current and protects the downstream equipment. The fuse body typically includes a non-meltable element which prevents a higher rated current than it is designed for from flowing.

0438004.WRA also features a built-in indicator that changes color when the fuse is energized, allowing for easy inspection of the fuse’s status. This makes it easier for operators to know when the fuse does not need to be replaced. Additionally, 0438004.WRA is designed to operate with minimal arcing and sparks for improved safety and longer life.

Conclusion

In conclusion, 0438004.WRA is a medium-voltage load-interrupting air fuses designed for both indoor and outdoor, pole-mounted applications up to 15 kV. It is designed as an economical fuse solution for medium voltage, load-interrupting applications such as overhead, pole-mounted secondary distribution, and secondary metering. 0438004.WRA features a built-in indicator that changes color when the fuse is energized, allowing for easy inspection of the fuse’s status. The fuse body consists of several meltable elements that are placed between the terminals, forming a closed loop, and it prevents a higher rated current than it is designed for from flowing. 0438004.WRA is designed to operate with minimal arcing and sparks for improved safety and longer life.

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