Fuse cutout

The fuse elements used in most distribution cutouts are tin or silver alloy wires that melt when subjected to high enough current.

Mechanical tension on the fuse link normally holds an ejector spring in a stable position.

Each fuse holder typically has an attached pull ring that can be engaged by a hook at the end of a fiberglass hot stick operated by a lineworker standing on the ground or from a bucket truck, to manually open the switch.

For applications where the switch is likely to be used to interrupt power manually, a "load break" version is available that has an attachment to quench the arc.

This design allows for the interchangeable use of cutout bodies and fuse holders manufactured by different vendors.

Cutout (left) attached to a feeder line (connection at the right not shown). The lower wire goes to the transformer
A set of pole top cutouts (with C-shaped bodies) protecting a transformer on a 12.47 kV distribution line. One fuse is blown and the tube is hanging down. Lightning arresters are mounted on the crossarm opposite the fuse cutouts.
Fuse cutouts with V-shaped bodies.
Fuse cutouts with V-shaped bodies.
Two utility linemen with hard hats work to replace a cutout fuse 35 feet above them with a non-conductive pole with a hook on the top.
Linemen from Huntsville Utilities replace a blown cutout fuse with a non-conductive extending pole tool on July 10th, 2022 in Huntsville, Alabama.