Transformer Riddle No.107 - Three Phase Transformer Star Delta voltages to ground
Can you advise what will be the Voltage to Earth on delta side.
The Data is
400/650 STAR / DELTA Dyn11 5.75%
On secondary side
V Line - Line = 650V
V line - Earth = ?
Author : Iqbal - From: UK
Thu, January 28th, 2016 - 11:41
If delta side of transformer be non-earthed, there is no difference voltage between winding and ground, thus in some case one delta corner of delta connection is grounded. When delta side of transformer is grounded via auxiliary earthing transformer, it is line to line voltage divided to √3.