Setting Examples - Hitachi Relion 670 Series Applications Manual
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Also See for Relion 670 Series:
- Applications manual (438 pages) ,
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- Product manual (192 pages)
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Section 16
Monitoring
XLowLowLim: Low-low limit. Set as % of YBase (Y is SBase for S,P,Q UBase for Voltage measurement
and IBase for current measurement).
XLimHyst: Hysteresis value in % of range and is common for all limits.
All phase angles are presented in relation to defined reference channel. The parameter PhaseAngleRef
defines the reference.
Calibration curves
It is possible to calibrate the functions (CVMMXN, CMMXU, VMMXU and VNMMXU) to get class 0.5
presentations of currents, voltages and powers. This is accomplished by magnitude and angle
compensation at 5, 30 and 100% of rated current and voltage. The compensation curve will have the
characteristic for magnitude and angle compensation of currents as shown in figure
first phase will be used as reference channel and compared with the curve for calculation of factors. The
factors will then be used for all related channels.
IMagComp5
IMagComp30
IMagComp100
Degrees
IAngComp30
IAngComp5
IAngComp100
ANSI05000652 V3 EN-US
Figure 97:
16.1.5.1
Setting examples
Three setting examples, in connection to Measurement function (CVMMXN), are provided:
•
Measurement function (CVMMXN) application for a OHL
•
Measurement function (CVMMXN) application on the secondary side of a transformer
•
Measurement function (CVMMXN) application for a generator
234
Magnitude
% of In
compensation
+10
5
30
-10
Angle
compensation
+10
5
30
-10
Calibration curves
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0-5%:
Constant
5-30-100%: Linear
>100%:
Constant
1MRK511407-UUS Rev. N
97
(example). The
Measured
current
100
% of In
Measured
current
100
% of In
ANSI05000652_3_en.vsd
Phasor measurement unit RES670
Application manual
SEMOD54481-4 v5
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