Hitachi Relion 670 Series Applications Manual page 314

Section 14
Logic
14.14 Comparator for real inputs - REALCOMP
14.14.1 Function revision history
Document
revision
A
B
C
D
E
F
G
H
M
N
14.14.2 Identification
Function description
Comparator for real inputs
14.14.3 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.
14.14.4 Setting guidelines
Setting procedure on the IED:
EnaAbs: 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: 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: 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: 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.
308
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 Settings EqualBandLow and EqualBandHigh maximum value has been changed to 50.00
in order to make the function more user friendly.
2.2.3 -
2.2.4 -
2.2.4 -
2.2.5 -
2.2.6 -
2.2 -
IEC 61850
identification
REALCOMP
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GUID-D91005E2-2607-4FE2-A500-29D1F15CAEC4 v3
GUID-0D68E846-5A15-4C2C-91A2-F81A74034E81 v1
IEC 60617 ANSI/IEEE C37.2
identification device number
Real<=>
GUID-5F7B1683-9799-4D27-B333-B184F8861A5B v1
GUID-DE69FF5B-7D34-4A30-9060-214E98BFF798 v3
Railway application RER670
1MRK506375-UEN Rev. N
Application manual