Understanding The Auxiliary Equipment Of Drop-out Fuses In Power Distribution Systems

At the connection points of high-voltage line branches and distribution transformers, the installation location of drop out fuse unit is obvious, and its physically visible disconnected state provides operational feedback to on-site personnel. By pulling out the fuse and holding it in the disconnected position, an isolation point can be artificially created, allowing maintenance teams to inspect and handle lines or equipment in a de-energized state.

This auxiliary application method stems from the mechanical design of the drop out type fuse itself. In the event of overload or short circuit, the melt will quickly detach from the base as designed. However, under no-load conditions, with the aid of specialized tools, it can be manually tripped, completing a manual disconnection. This facilitates power operation during certain maintenance and on-site switching procedures.