Arc Flash Option ^{Version 3.12.1 : Feature 8053 24/08/2023}

During the protection study that underpins each Arc Flash Incident Energy calculation, where the fault is energised via multiple infeeds, as each infeed is removed it is possible for the bolted fault current to fall below the minimum level supported by IEEE Std 1584-2018. Should that occur, it is no longer possible to determine an arcing current, which means clearance time and consequently incident energy cannot be determined. Should this condition occur, ERACS now provides a setup parameter, labelled "If Bolted Fault Current falls below 1584-2018 minimum during study, calculate Incident Energy up to that point", allowing you to choose what to do…

1. If ticked, Incident Energy will be calculated up to the point at which Bolted Fault Current falls below the minimum threshold. Where this approach has been employed, a tilde (~) symbol will be appended to appropriate values.
2. If unticked (the default), Incident Energy will not be calculated when Bolted Fault Current falls below the minimum threshold and a BCBM (Bolted fault Current fell Below Minimum) acronym will be used in place of the values which couldn't be determined.