What are the implications, on the downstream loads, when switching from a Wye-Delta 4800V system to a Delta-Wye 13800V system?
Other than changing every transformer or piece of equipment you may find issues because of grounding the system. Other than that you will have a grounded (safer) system on the down stream side. The upstream you will no longer be a ground source and that may impact the utility serving. Chances are they will prefer you being ungrounded unless you are generating power.
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