Why Should An Independent Ground Wire Be Used When Wiring An Automatic Voltage Regulator?

When wiring 20kva voltage regulator, it is best to connect the ground wire independently to ensure safety. An independent ground wire separates the grounding path from the live and neutral wires, thus providing a low-impedance, well-defined discharge path for 3 phase automatic stabilizer in case of power abnormalities or a live casing. Sharing the ground wire with other lines may lead to unstable grounding potential or interference being transferred to the core of the system, which contradicts the "potential reference to zero" attribute that the ground wire should possess.