ABB Relion 670 Series Applications Manual page 533

1MRK 511 401-UEN Rev. K
IEC vector group
YNd1
Dyn1
YNd11
Dyn11
YNd5
Dyn5
Settings for transformer withstand capability calculation
Four different protection curves are given in the IEEE C57.109.1993 standard for different
categories of transformer which are covered by IEEE C57.12.00-1993 standard. These curves
are based on the historical evolution of the short circuit withstand requirements and these
should be applicable to transformers built beginning in the early 1970s.
Bay control REC670
Application manual
Positive sequence no-load
voltage phasor diagram
Y
IEC06000559 V1 EN-US
Y
IEC06000560 V1 EN-US
Y
IEC06000561 V1 EN-US
Y
IEC06000562 V1 EN-US
Y
IEC06000563 V1 EN-US
Y
IEC06000564 V1 EN-US
For transformers built prior to the early 1970s, consult the manufacturer for
short circuit withstand capabilities as a precaution.
© Copyright 2017 Hitachi Power Grids. All rights reserved
Required delta CT connection type on star side of the
protected power transformer and internal vector group
setting in the IED
DAC/Yy0
DAB/Yy0
DAB/Yy0
DAC/Yy0
DAB/Yy6
DAC/Yy6
Section 18
Monitoring
GUID-DC24F8F5-C65A-4C6D-A892-F5605CAAA49A v1
527