ABB REB670 Series Applications Manual page 361

1MRK 505 370-UEN D
Example of CVMMXN operation
Outputs seen on the local HMI under Main menu/Measurements/Monitoring/
Servicevalues(P_Q)/CVMMXN(P_Q):
S
P
Q
PF
ILAG
ILEAD
U
I
F
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
are forced to zero.
• When system current falls below
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
forced to zero.
14.1.4 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
SBase . Note that this function will only use IBase value.
and
Operation : Off / On . Every function instance (CVMMXN, CMMXU, VMMXU, CMSQI, VMSQI,
VNMMXU) can be taken in operation (
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
Busbar protection REB670
Application manual
Apparent three-phase power
Active three-phase power
Reactive three-phase power
Power factor
I lagging U
I leading U
System mean voltage, calculated according to selected mode
System mean current, calculated according to selected mode
Frequency
UGenZeroDB , values for S, P, Q, PF, ILAG, ILEAD, U and F
IGenZeroDB , values for S, P, Q, PF, ILAG, ILEAD, U and F
On ) or out of operation ( Off ).
SZeroDb , the value for S is
UGenZeroDb calculated S, P, Q and PF will be zero.
Section 14
Monitoring
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