Hioki PW3390 - Delta Star Transform Function

5.5 Delta Star Transform Function
116
For 3P3W3M wiring systems (wiring mode 7 on p.37),  (Delta) wiring configuration values are converted to
Y (Wye) wiring values ('star' configuration) so that measured values are equivalent to those of 3P4W lines.
When this function is enabled, even when a motor has internal Wye wiring and the central (neutral) point
is inaccessible, it can be measured using phase voltage to emulate the Wye configuration.
-Y transform analyzes voltage waveforms after performing vector conversion using a virtual neutral.
Although voltage waveforms, voltage measurement values, and harmonic voltages are all input as line
voltages, they are calculated as phase voltages.
Illustration of
-Y transform
5.5 Delta Star Transform Function
-Y
()
A
BC
A
BC
U1
U2
U3
U1
U2
U3