Analysis of high-breaking-capacity fuselink arcing phenomena

The complex nature of the phenomena during arcing periods in modern current-limiting fuselinks makes it extremely difficult to construct exact mathematical models. This paper describes a model based on a number of simplifying assumptions, and it is demonstrated that the correspondence obtained between the voltage and current characteristics derived from it and those obtained by experiment is generally acceptable. It is shown that the model may also be used to determine the effects of variations of other parameters such as arc temperature and it should enable designs to be optimised.