Signal Matrix For Ma Inputs Smmi - ABB REC670 Applications Manual

1MRK 511 401-UEN A
23.10
23.10.1
23.10.2
23.11
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23.11.2
Bay control REC670 2.2 IEC
Application manual

Signal matrix for mA inputs SMMI

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.
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.
Signal matrix for analog inputs SMAI
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).
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 MinValFreqMeas, the function
freezes the frequency output 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 ConnectionType is Ph-Ph, at least two of the inputs GRPxL1,
GRPxL2 and 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 ConnectionType is Ph-N, all three inputs GRPxL1, GRPxL2 and
GRPxL3 must be connected in order to calculate the positive sequence voltage.
Section 23
Basic IED functions
SEMOD55233-1 v2
SEMOD55237-5 v2
SEMOD55247-5 v2
SEMOD55751-1 v2
SEMOD55744-4 v10
GUID-B494B93C-B5AA-4FD6-8080-8611C34C2AD8 v5
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