ABB RELION RET670, Applications Manual

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17.14 Comparator for real inputs - REALCOMP
17.14.1 Identification
GUID-0D68E846-5A15-4C2C-91A2-F81A74034E81 v1
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Comparator for real inputs REALCOMP Real<=>
17.14.2 Application
GUID-5F7B1683-9799-4D27-B333-B184F8861A5B v1
The function gives the possibility to monitor the level of real values in the system
relative to each other or to a fixed value. It is a basic arithmetic function that can be
used for monitoring, supervision, interlocking and other logics.
17.14.3 Setting guidelines
GUID-DE69FF5B-7D34-4A30-9060-214E98BFF798 v2
Setting procedure on the IED:
EnaAbs : This setting is used to select the comparison type between signed and absolute
values.
• Absolute : Comparison is performed with absolute values of input and reference.
• Signed : Comparison is performed with signed values of input and reference.
RefSource : This setting is used to select the reference source between input and setting
for comparison.
• Input REF : The function will take reference value from input REF
• Set Value : The function will take reference value from setting SetValue
SetValue : This setting is used to set the reference value for comparison when setting
RefSource is selected as Set Value . If this setting value is less than 0.2% of the set unit
then the output INLOW will never pickup.
RefPrefix : This setting is used to set the unit of the reference value for comparison
when setting RefSource is selected as SetValue . It has 5 unit selections and they are
Milli, Unity, Kilo, Mega and Giga.
EqualBandHigh : This setting is used to set the equal condition high band limit in % of
reference value. This high band limit will act as reset limit for INHIGH output when
INHIGH.
Section 17
1MRK 504 163-UUS A
Logic
860 Transformer protection RET670 2.2 ANSI
Application manual