Our intention was to route the feeder to the single phase distribution panelboard through a delts/wye transformer and develope a neutral specifically for these loads.
The gear is 2o+ years old and the Pringle switches are LBFs.
I have a small facility fed from three 2.5 Mva 480/480-277 transformers. The secondary feeds gear housing three 1500 amp Pringle fused switches, each of which are protecting a load. which are 1:Process machinery, 2:facilities equipment, and 3: a lighting Panel board.
When a ground fault occurs...
