The performance of overhead line insulation in DC differs from AC due to ionization of airborne particles resulting from the unidirectional electric field.
In electrical distribution, a fuse cutout or cut-out fuse is a combination of a fuse and a switch, used in primary overhead feeder lines and taps to protect distribution transformers from current surges and overloads.
Mechanical loading of suspension insulators is straightforward and definitions of Specified Mechanical Load (SML) and Rated Tensile Load (RTL) are well understood and also easily quantifiable.
