SETUP AND CONNECTIONS
AVTMTTR100-ENG Rev 6 Nov 2015
25
Connections and Vector Voltage Diagrams
Table 5-2 shows winding diagrams for standard transformers and nonstandard
transformers for power and distribution transformers marked in accordance with
the ANSI standard. Table 5-3 shows winding diagrams for power transformers
marked in accordance with the CEI/IEC standard, and Table 5-4 shows winding
diagrams for power transformers marked in accordance with the Australian
standard.
To make a measurement on a three-phase power transformer, match the vector
diagram from the transformer nameplate to the corresponding winding
connection diagram from Table 5-2 through 5-4, then select the corresponding
IEC vector group (column 2 of table) on the appropriate setup menu of the
instrument.
The tables show the windings tested for each of the three phases. The tables
also show the relationship between the measured turn ratio and the actual line-
to-line voltage ratio. For the ANSI specification, the rated voltage on the
high-voltage winding is represented by V
H
; V
X
represents rated voltage on the
low-voltage winding.
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