ABB Relion RES670, Technical Manual

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The outputs on SMMI can also be connected to the IEC 61850 generic communication
I/O functions (MVGAPC) for further use of the mA signals elsewhere in a substation
system.
22.9 Signal matrix for analog inputs SMAI
SEMOD55751-1 v2
22.9.1 Functionality
SEMOD55744-4 v10
Signal matrix for analog inputs (SMAI), also known as the preprocessor function
block, analyses the connected four analog signals (three phases and neutral) and
calculates all relevant information from them like the phasor magnitude, phase angle,
frequency, true RMS value, harmonics, sequence components and so on. This
information is then used by the respective functions connected to this SMAI block in
ACT (for example protection, measurement or monitoring functions).
22.9.2 Function block
SEMOD55766-1 v2
SEMOD54868-4 v11
SMAI1
BLOCK
DFTSPFC
REVROT
^GRP1_A
^GRP1_B
^GRP1_C
^GRP1_N SPFCOUT
G1AI3P
G1AI1
G1AI2
G1AI3
G1AI4
G1N
ANSI14000027-1-en.vsd
ANSI14000027 V1 EN-US
Figure 301: SMAI1 function block
Figure 301 is an example of SMAI1:n in each of the four task time groups 1, 2, 3 or 4
where:
• n=1–12 in task group 1
• n=13–24 in task group 2
• n=25–36 in task group 3
• n=37–48 in task group 4
The task time defines the execution repetition rate, and is 1, 3, 8 or 0.9 ms respectively
for the four task time groups.
Section 22
1MRK 511 408-UUS A
Basic IED functions
786 Phasor measurement unit RES670 2.2 ANSI
Technical manual