ABB Relion 670 Series Applications Manual page 592

Section 24
Basic IED functions
24.10 Signal matrix for mA inputs SMMI
24.10.1 Application
The Signal matrix for mA inputs function SMMI is used within the Application Configuration
tool in direct relation with the Signal Matrix tool. SMMI represents the way milliamp (mA)
inputs are brought in for one IED configuration.
24.10.2 Setting guidelines
There are no setting parameters for the Signal matrix for mA inputs SMMI available to the user
in the Parameter Setting tool. However, the user must give a name to SMMI instance and SMMI
inputs, directly in the Application Configuration tool.
24.11 Signal matrix for analog inputs SMAI
24.11.1 Application
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).
24.11.2 Frequency values
The SMAI function includes a functionality based on the level of positive sequence voltage,
MinValFreqMeas , to validate if the frequency measurement is valid or not. If the positive
sequence voltage is lower than
value for 500 ms and after that the frequency output is set to the nominal value. A signal is
available for the SMAI function to prevent operation due to non-valid frequency values.
MinValFreqMeas is set as % of UBase /√3
If SMAI setting
GRPxL3, where 1≤x≤12, must be connected in order to calculate the positive sequence voltage.
Note that phase to phase inputs shall always be connected as follows: L1-L2 to GRPxL1, L2-L3
to GRPxL2, L3-L1 to GRPxL3. If SMAI setting
GRPxL2 and GRPxL3 must be connected in order to calculate the positive sequence voltage.
If only one phase-phase voltage is available and SMAI setting
user is advised to connect two (not three) of the inputs GRPxL1, GRPxL2 and GRPxL3 to the
same voltage input as shown in figure
586
MinValFreqMeas , the function freezes the frequency output
ConnectionType is Ph-Ph , at least two of the inputs GRPxL1, GRPxL2 and
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ConnectionType is Ph-N , all three inputs GRPxL1,
ConnectionType is Ph-Ph , the
280 to make SMAI calculate a positive sequence voltage.
1MRK 511 401-UEN Rev. K
SEMOD55233-1 v2
SEMOD55237-5 v2
SEMOD55247-5 v2
SEMOD55751-1 v2
SEMOD55744-4 v10
GUID-B494B93C-B5AA-4FD6-8080-8611C34C2AD8 v5
Bay control REC670
Application manual