The Blowing Of A Drop-out Fuse Is The Core Action For Fault Isolation In A Power Distribution System.

The structure of drop out fuse mainly consists of an insulating support, a fuse tube, and its contacts. During normal operation, the fuse tube is in close contact with the upper and lower contacts through its internal fuse wire, allowing current to flow smoothly in this closed state. When an abnormal current occurs in the line, the fuse wire breaks rapidly due to thermal effect, and the fuse tube then falls away from the contacts under gravity, forming a clear break point.

In power maintenance, this physical break point provides on-site personnel with a clear indication of the isolation status, helping them confirm the power supply status and facilitating on-site operations and subsequent equipment replacement.