Setting Guidelines; Setting Example - Hitachi Relion 670 Series Applications Manual
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1MRK511407-UUS Rev. N
15.14.4
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.
EqualBandHigh: 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: 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.
15.14.5
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
EqualBandLow = 5.0 % of reference value
Operation
The function will set the outputs for the following conditions,
INEQUAL will set when the INPUT is between the ranges of 95 to 105 kA.
INHIGH will set when the INPUT crosses above 105 kA.
INLOW will set when the INPUT crosses below 95 kA.
Phasor measurement unit RES670
Application manual
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Section 15
Logic
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