The S&C Vista has three voltage ratings; 15.5, 29, and 38 kV max. I believe the 23,000V rating you are referring to is the voltage rating in the SKM library. Since the standard SKM library does not have a relay rated 38,000V it's probably getting flagged when you run the Equipment Evaluation...
Setting the pickup level (51) a little higher or lower probably won't have any impact on arc-flash mitigation. If you're clearing on the time-over current portion of the curve, you're probably into the 0.5-1.0+ second timeframe anyway - so incident energy levels will be high regardless of where...
Minimum-melt curves for power fuses are typically plotted at 25C with no initial load. Although on paper it may appear that the 100A fuses are okay, but when the fuse element is heated due to load current or higher ambient operating temperatures, the fuses will respond sooner. This is most...
