ABB REB670 Series - Setting guidelines

Example of CVMMXN operation
Outputs seen on the local HMI under Main menu/Measurements/Monitoring/
Servicevalues(P_Q)/CVMMXN(P_Q):
S Apparent three-phase power
P Active three-phase power
Q Reactive three-phase power
PF Power factor
ILAG I lagging U
ILEAD I leading U
U System mean voltage, calculated according to selected mode
I System mean current, calculated according to selected mode
F Frequency
Relevant settings and their values on the local HMI under Main menu/Settings/IED settings/
Monitoring/Servicevalues(P_Q)/CVMMXN(P_Q):
• 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.
14.1.4 Setting guidelines
SEMOD54481-165 v14
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 . Note that this function will only use IBase value.
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.
1MRK 505 370-UEN D Section 14
Monitoring
Busbar protection REB670 355
Application manual