ABB Relion 630 Series, Technical Manual

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3.8 Signal matrix for analog inputs SMAI
3.8.1 Functionality
Signal matrix for analog inputs function (SMAI), also known as the preprocessor
function, processes the analog signals connected to it and gives information about all
aspects of the analog signals connected, like the RMS value, phase angle, frequency,
harmonic content, sequence components and so on. This information is used by the
respective functions in Application Configuration, for example, protection,
measurement or monitoring.
The SMAI function is used within PCM600 in direct relation with the Signal Matrix
or the Application Configuration tools.
3.8.2 Signal matrix for analog inputs SMAI_20_1
3.8.2.1 Function block
SMAI_20_1
BLOCK
DFTSPFC
REVROT
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N SPFCOUT
AI3P
AI1
AI2
AI3
AI4
AIN
IEC09000137-1-en.vsd
IEC09000137 V1 EN
Figure 31: SMAI_20_1 function block
3.8.2.2 Signals
Table 24: SMAI_20_1 Input signals
Name Type Default Description
BLOCK BOOLEAN 0 Block group 1
DFTSPFC REAL 20.0 Number of samples per fundamental cycle used for
DFT calculation
REVROT BOOLEAN 0 Reverse rotation group 1
GRP1L1 STRING - First analog input used for phase L1 or L1-L2
quantity
GRP1L2 STRING - Second analog input used for phase L2 or L2-L3
quantity
GRP1L3 STRING - Third analog input used for phase L3 or L3-L1
quantity
GRP1N STRING - Fourth analog input used for residual or neutral
quantity
1MRS757256 F
Section 3
Basic functions
PML630/Compact Load-Shedding Solution 57
Technical Manual