SJT;
If a Wye connected Secondary is used without bringing a System Grounded Conductor (from "X0" Terminal) to the Panelboards, this will be considered a Single Voltage Separately Derived System ("SDS").
If the SDS (Panels fed from the Secondary side of the 45 KVA Transformer) DO NOT utilize a Grounded Conductor derived from Terminal "X0", this will be a "Single Voltage System".
Scott
Scott,
I think your above statements might be misleading.
The connection at the transformer defines the system voltages. The system voltages define whether the system is 'single voltage' or 'multi-voltage.
If the neutral point (i.e. X0 terminal) is solidly grounded it is multi-voltage, regardless if the panelboard does or does not contain the grounded conductor.
