Curve fitting analysis of time-current characteristic of expulsion fuse links

摘要

This work aims to modeling the Time-Current Characteristics (TCC) of expulsion fuse links through mathematics equations. To achieve this, the Least Square Method has been used and the Residual Sum of Squares (RSS) as a comparative parameter. From this parameter, it is possible to identify models that have the better adjustment in global scope considering the different nominal current ratings, speed ratios and manufacturers. The coefficients from the equations with the minor RSS will be available, so researchers of distribution system protection can use it in future works.