Table 17:
TRM_6I Monitored data
Name
Type
Values (Range)
Unit
Description
STATUS
BOOLEAN
0=Ok
1=Error
-
Analogue input module
status
Table 18:
TRM_7I_5U Monitored data
Name
Type
Values (Range)
Unit
Description
STATUS
BOOLEAN
0=Ok
1=Error
-
Analogue input module
status
Table 19:
TRM_9I_3U Monitored data
Name
Type
Values (Range)
Unit
Description
STATUS
BOOLEAN
0=Ok
1=Error
-
Analogue input module
status
3.6
Operation principle
The direction of a current depends on the connection of the CT. The main CTs are
typically star connected and can be connected with the star point towards the object or
away from the object. This information must be set in the IED.
The convention of the directionality is defined as follows:
•
Positive value of current or power means that the quantity has the direction into
the object.
•
Negative value of current or power means that the quantity has the direction out
from the object.
For directional functions the directional conventions are defined as follows (see figure
)
•
Forward
means the direction is into the object.
•
Reverse
means the direction is out from the object.
Section 3
1MRK502052-UEN B
Analog inputs
72
Technical manual
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