Example 2 - Hitachi Relion 670 Series Applications Manual

1MRK506375-UEN Rev. N
I
s
Setting of current input:
Set parameter
CTStarPoint with
Transformer as
reference object.
Correct setting is
IEC05000753 V2 EN-US
Figure 9:
Figure 9
shall be done according to the figure. To protect the line, direction of the directional functions of the
line protection shall be set to Forward. This means that the protection is looking towards the line.
4.2.2.2

Example 2

Two IEDs used for protection of two objects and sharing a CT.
Railway application RER670
Application manual
Transformer
I
p
Transformer
protection
IED
Setting of current input:
Set parameter
CTStarPoint with
Transformer as
reference object.
Correct setting is
"ToObject"
Example how to set CTStarPoint parameters in the IED
shows the normal case where the objects have their own CTs. The settings for CT direction
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I
I
p
p
I
s
Setting of current input:
Set parameter
CTStarPoint with
reference object.
Correct setting is
"ToObject" "FromObject"
Line
Line
Reverse Forward
Definition of direction
for directional functions
Line protection
IED
Line as
IEC05000753=IEC05
000753=1=en=Origin
al[1].vsd
Section 4
Analog inputs
SEMOD55055-29 v7
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