If the calculated X/R is not greater than the fuse test X/R then Iadisym can be set equal to Tarn in step 1110. In step 1114, it can then be determined if the fuse rating (step 1104) is greater than or equal to Iadjsym or Iasym. If it is, then it can determine in step 1118 that the protected device has passed and the percent rating can be calculated in step 1120 as follows: