ABB Relion 650 Series Applications Manual page 200

Section 12
Monitoring
XDbRepInt : Reporting deadband setting. Cyclic reporting is the setting value and is reporting
interval in seconds. Magnitude deadband is the setting value in % of measuring range. Integral
deadband setting is the integral area, that is, measured value in % of measuring range multiplied
by the time between two measured values.
XHiHiLim : High-high limit.
XHiLim : High limit.
XLowLim : Low limit.
XLowLowLim : Low-low limit.
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, VNMMXU and VMMXU) 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
(example). The 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.
194
Limits are directly set in applicable measuring unit, V, A , and so on, for all
measureing functions, except CVMMXN where limits are set in % of the base
quantity.
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Busbar protection REB650
Application manual