The SKM Arc Flash Evaluation study module, by default, uses the published IEEE 1584 standard working distances based on the voltage level and the equipment type:
Working Distance Equipment Type kV
24 inches (610mm) Switchgear ≤ 1
18 inches (455mm) Panel ≤ 1
36 inches (910mm) Switchgear > 1 & < 35
72 inches (1829mm) Switchgear > 35
18 inches (455mm) all others
To change the working distanced based on your engineering judgment, left-click on the desired bus name cell and then right click to display the menu. Here you can ‘unlink’ six different fields.
This will unlink the working distance for a bus(s) you have selected, not all buses.
To globally change the working distances for several buses, highlight the working distance cells in the Arc Flash Evaluation window. Right-click to display the menu and select Global Change.
