ABB RELION 670 SERIES Applications Manual page 78

Section 4
Analog inputs
72
ANSI06000196 V1 EN
Figure 11: Example how to set CT_WyePoint parameters in the IED
For busbar protection, it is possible to set the CT_WyePoint parameters in two ways.
The first solution will be to use busbar as a reference object. In that case for all CT inputs
marked with 1 in Figure 11, set CT_WyePoint = ToObject, and for all CT inputs marked
with 2 in Figure 11, set CT_WyePoint = FromObject.
The second solution will be to use all connected bays as reference objects. In that case for
all CT inputs marked with 1 in Figure 11, set CT_WyePoint = FromObject, and for all CT
inputs marked with 2 in Figure 11, set CT_WyePoint = ToObject.
Busbar
Busbar
Protection
1
2
Line distance protection REL670 2.2 ANSI
1MRK 506 369-UUS -
2
1
en06000196_ansi.vsd
Application manual