Example for use of GRP_OFF signal in FXDSIGN
The Restricted earth fault function REFPDIF can be used both for auto-transformers
and normal transformers.
When used for auto-transformers, information from both windings parts, together
with the neutral point current, needs to be available to the function. This means that
three inputs are needed.
I3PW1CT1
I3PW2CT1
I3P
REFPDIF
IEC09000619_3_en.vsd
IEC09000619 V3 EN
Figure 102:
REFPDIF function inputs for autotransformer application
For normal transformers only one winding and the neutral point is available. This
means that only two inputs are used. Since all group connections are mandatory to be
connected, the third input needs to be connected to something, which is the GRP_OFF
signal in FXDSIGN function block.
I3PW1CT1
I3PW2CT1
I3P
REFPDIF
GRP_OFF
FXDSIGN
IEC09000620_3_en.vsd
IEC09000620 V3 EN
Figure 103:
REFPDIF function inputs for normal transformer application
11.6
Boolean 16 to integer conversion B16I
11.6.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Boolean 16 to integer conversion
B16I
-
-
Section 11
1MRK 505 291-UEN A
Logic
254
Application manual
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