Thanks a lot Radar.
You right, touchable metalic surfaces is still grounded/bonded.
Understand that we may lost the benefit of grounding system, somehow, the benefit of become delta system is higher economically, due to operation continuity, and some device/instrument we use require delta connection system in the transformer secondary.
I repeat again, secondary system 480 V or 960 V is totally underground,
So, I presume if we can provide high level insulation class, fast enough phase to phase fault detection beside voltage unbalance detection for any single phase to ground fault, we may get a perfect system & not leaving a hazard for people/operator who come to this facility on weekly basis.
Is that other potential safety issue? or am I over looked?
