OPERATION
AVTMTTR100-ENG Rev 6 Nov 2015
65
Test Result Symbols
N1
Turns ratio of single phase transformer or turns ratio of
X1–X2 secondary winding section of a two-secondary
winding distribution transformer.
N2
Turns ratio of X3-X2 secondary winding section of a two-
secondary winding distribution transformer.
NA, NB, NC
Turns ratio of three phase transformer for phase A, B and
C, respectively.
P12
Phase angle (displacement) between the primary and
secondary single phase transformer windings or between
the primary and X1-X2 secondary winding section of a
two-secondary winding distribution transformer.
P32
Phase angle (displacement) between the primary and X3-
X2 secondary windings of a two-secondary winding
distribution transformer.
PA, PB, PC
Phase angle (displacement) between the primary and
secondary windings of three phase transformer for phase
A, B and C, respectively.
I
Excitation current of single phase transformer.
IA, IB, IC
Excitation current of three phase transformer for phase A,
B and C, respectively.
RH
Primary winding resistance of single phase transformer.
R12
Secondary winding resistance of single phase transformer
or X1-X2 winding section of a two-secondary winding
distribution transformer.
R32
Secondary winding resistance of X3-X2 winding section of
a two-secondary winding distribution transformer.
RHA, RHB, RHC
Primary winding resistance of three phase transformer for
phase A, B and C, respectively.
RXA, RXB, RXC
Secondary winding resistance of three phase transformer
for phase A, B and C, respectively.
‘, O, ^
Phase angle (displacement) in minutes, degrees, or
centiradians, respectively
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