Rockwell Automation 6000 PowerFlex Medium Voltage Variable Frequency Drive Installation Instructions - Manual (Page 57)

Rockwell Automation Publication 6000-IN006A-EN-P - April 2014 57
Drive Electrical Interconnection Chapter 4
Connect Isolation
Transformer Secondary
Power Cables Introduction
The isolation transformer’s three-phase primary coils are oriented C, B, and A
from left to right, as viewed from the front. The secondary windings are also
divided into three principal sections from top to bottom. The upper third are to
feed the power modules in the U output phase. The middle third are to feed the
power modules in the V output phase. The bottom third are to feed the power
modules in the W output phase (
Figure 36 ).
Figure 36 - Isolation Transformer Primary and Secondary Winding Orientation
The secondary windings are brought out to corresponding vertical isolated stand-
offs on the body of the transformer (orientated C, B, and A from left to right as
viewed from the front). See
Figure 37 .
PRIMARY WINDING INPUT
SECONDARY
WINDING
OUTPUT
C (L3) B (L2) A (L1)
U
V
W