ABB REB670 Applications Manual page 71

1MRK 505 337-UUS -
ANSI05000462 V1 EN
Figure 18: Example how to set CT_WyePoint parameters in the IED
Application manual
Normally it is not any limitation but it is advisable to have it in mind and check if it is
acceptable for the application in question.
If the IED has a sufficient number of analog current inputs an alternative solution is shown
in figure 18. The same currents are fed to two separate groups of inputs and the line and
transformer protection functions are configured to the different inputs. The CT direction
for the current channels to the line protection is set with the line as reference object and the
directional functions of the line protection shall be set to Forward to protect the line.
Transformer
Setting of current input
for transformer functions:
Set parameter
CT_WyePoint with
Transformer as
reference object.
Correct setting is
"ToObject"
Transformer and
Line protection
Setting of current input
for transformer functions:
Set parameter
CT_WyePoint with
Transformer as
reference object.
Correct setting is
"ToObject"
Section 4
Analog inputs
Line
Reverse Forward
Definition of direction for
directional
line functions
Setting of current input
for line functions:
Set parameter
CT_WyePoint with
Line as
reference object.
Correct setting is
"FromObject"
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