Setting Guidelines - ABB RED650 Applications Manual

Section 15
Monitoring
15.1.4
320
• When system voltage falls below UGenZeroDB, values for S, P, Q, PF, ILAG,
ILEAD, U and F are forced to zero.
• When system current falls below IGenZeroDB, values for S, P, Q, PF, ILAG,
ILEAD, U and F are forced to zero.
• When the value of a single signal falls below its set deadband, the value is
forced to zero. For example, if the apparent three-phase power falls below
SZeroDb, the value for S is forced to zero.

Setting guidelines

The available setting parameters of the measurement function CVMMXN,
CMMXU, VMMXU, CMSQI, VMSQI, VNMMXU are depending on the actual
hardware (TRM) and the logic configuration made in PCM600.
The parameters for the Measurement functions CVMMXN, CMMXU, VMMXU,
CMSQI, VMSQI, VNMMXU are set via the local HMI or PCM600.
GlobalBaseSel: Selects the global base value group used by the function to define
IBase, UBase and SBase as applicable.
Operation: Off/On. Every function instance (CVMMXN, CMMXU, VMMXU,
CMSQI, VMSQI, VNMMXU) can be taken in operation (On) or out of operation
(Off).
The following general settings can be set for the Measurement function
(CVMMXN).
PowAmpFact: Amplitude factor to scale power calculations.
PowAngComp: Angle compensation for phase shift between measured I & U.
Mode: Selection of measured current and voltage. There are 9 different ways of
calculating monitored three-phase values depending on the available VT inputs
connected to the IED. See parameter group setting table.
k: Low pass filter coefficient for power measurement, U and I.
UGenZeroDb: Minimum level of voltage in % of UBase, used as indication of zero
voltage (zero point clamping). If measured value is below UGenZeroDb calculated
S, P, Q and PF will be zero.
IGenZeroDb: Minimum level of current in % of IBase, used as indication of zero
current (zero point clamping). If measured value is below IGenZeroDb calculated
S, P, Q and PF will be zero.
UAmpCompY: Amplitude compensation to calibrate voltage measurements at Y%
of Ur, where Y is equal to 5, 30 or 100.
IAmpCompY: Amplitude compensation to calibrate current measurements at Y% of
Ir, where Y is equal to 5, 30 or 100.
1MRK 505 393-UEN B
Line differential protection RED650 2.2 IEC
Application manual
SEMOD54481-165 v14