2 VA/10VA=%20 3 VA/10 VA=%30 According to a.m. table for accuracy class 0.5, as you can see: 1- The error current for %20 to %30 of load consumption which could considered in %20 to %100 region is %0.75 2- The phase displacement angle error for %20 to %30 of load consumption which could considered in %20 to %100 region is 45 to 30 minute.