ABB RET670 - Page 125

IEC vector group ANSI designation Positive sequence no-load
voltage phasor diagram
Required delta CT connection
type on wye side of the
protected power transformer
and internal vector group
setting in the IED
YNd1 YD
AC
Y
IEC06000559 V1 EN
DAC/Yy0
Dyn1 D
AB
Y
Y
IEC06000560 V1 EN
DAB/Yy0
YNd11 YD
AB
Y
IEC06000561 V1 EN
DAB/Yy0
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1MRK504116-UUS C Section 3
IED application
119
Application manual