Setting Guidelines; Signal Matrix For Ma Inputs Smmi; Application; Signal Matrix For Analog Inputs Smai - Hitachi Relion 670 Series Applications Manual

Section 22
Basic IED functions
22.9.2

Setting guidelines

There are no setting parameters for the Signal matrix for binary outputs SMBO available to the user in
Parameter Setting tool. However, the user must give a name to SMBO instance and SMBO outputs,
directly in the Application Configuration tool. These names will define SMBO function in the Signal Matrix
tool.
22.10

Signal matrix for mA inputs SMMI

22.10.1

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.
22.10.2 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.
22.11

Signal matrix for analog inputs SMAI

22.11.1 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).
22.11.2

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 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 VBase/√3
If SMAI setting ConnectionType is Ph-Ph, at least two of the inputs GRPx_A, GRPx_B and GRPx_C,
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: A-B to GRPxA, B-C to GRPxB, C-A to GRPxC. If
SMAI setting ConnectionType is Ph-N, all three inputs GRPx_A, GRPx_B and GRPx_C must be
connected in order to calculate the positive sequence voltage.
If only one phase-phase voltage is available and SMAI setting ConnectionType is Ph-Ph, the user is
advised to connect two (not three) of the inputs GRPx_A, GRPx_B and GRPx_C to the same voltage
input as shown in figure
316
128 to make SMAI calculate a positive sequence voltage.
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Phasor measurement unit RES670
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