ABB Relion 670 Series Applications Manual page 447

1MRK 511 401-UUS F
16.14.2 Application
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.
16.14.3 Setting guidelines
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
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.
EqualBandLow : This setting is used to set the equal condition low band limit in % of reference
value. This low band limit will act as reset limit for INLOW output when INLOW.
16.14.4 Setting example
Let us consider a comparison is to be done between current magnitudes in the range of 90 to 110
with nominal rating is 100 and the order is kA.
For the above condition the comparator can be designed with settings as follows,
EnaAbs = Absolute
RefSource = Set Value
SetValue = 100
RefPrefix = Kilo
EqualBandHigh = 5.0 % of reference value
Bay control REC670
Application manual
Set Value . If this setting value is less than 0.2% of the set unit then the output INLOW
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Section 16
Logic
GUID-5F7B1683-9799-4D27-B333-B184F8861A5B v1
GUID-DE69FF5B-7D34-4A30-9060-214E98BFF798 v2
GUID-E7070CF6-B44B-4799-BE18-5C75B9FE2A87 v2
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