Table 865: SMAI2 Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 12 - 1 1 Selection of one of the Global Base Value
groups
DFTReference InternalDFTRef
DFTRefGrp1
DFTRefGrp2
DFTRefGrp3
DFTRefGrp4
DFTRefGrp5
DFTRefGrp6
DFTRefGrp7
DFTRefGrp8
DFTRefGrp9
DFTRefGrp10
DFTRefGrp11
DFTRefGrp12
External DFT ref
- - InternalDFTRef DFT reference
ConnectionType Ph-N
Ph-Ph
- - Ph-N Input connection type
AnalogInputType Voltage
Current
- - Voltage Analog input signal type
Table 866: SMAI2 Non group settings (advanced)
Name
Values (Range) Unit Step Default Description
Negation Off
NegateN
Negate3Ph
Negate3Ph+N
-
- Off Negation
MinValFreqMeas 5 - 200 % 1 10 Limit for frequency calculation in % of
UBase
20.15.5 Operation principle
Every Signal matrix for analog inputs function (SMAI) can receive four analog
signals (three phases and one neutral or residual value), either voltage or current, see
figure
512 and figure 513. SMAI outputs give information about every aspect of the
3ph analog signals acquired (phase angle, RMS value, frequency and frequency
derivates etc. – 244 values in total). The BLOCK input will force all outputs to value
zero if BLOCK is TRUE (1).
System phase rotation and frequency are defined using the PhaseRotation and
Frequency settings in the primary system values PRIMVAL function. Logic 1 in the
REVROT input to the SMAI function means that the phase rotation is changed relative
to the set PhaseRotation in PRIMVAL.
The output signal AI1 to AI4 are single phase outputs which directly represent the four
inputs GRPxL1, GRPxL2, GRPxL3 and GRPxN, x=1-12. GxN (x = 1-12) is always
calculated residual sum from the first three inputs. A3P is grouped, three-phase
information containing all relevant information about four connected inputs. Note that
all other functions, with a few exceptions, use this output in configuration. Note that
Section 20 1MRK502052-UEN B
Basic IED functions
1132
Technical manual
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