ABB RET670 Applications Manual page 44

Section 3
IED application
ANSI06000196 V1 EN
Figure 6: Example how to set CT_WyePoint parameters in the IED
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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 6, set CT_WyePoint = ToObject, and for all CT inputs
marked with 2 in figure 6, 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 6, set CT_WyePoint = FromObject, and for
all CT inputs marked with 2 in figure 6, set CT_WyePoint = ToObject.
Busbar
Busbar
Protection
1
2
1MRK504116-UUS C
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Application manual