ABB Relion 650 Series Technical Manual page 570

Section 16
Basic IED functions
16.10.4 Operation principle
Every Signal matrix for analog inputs function (SMAI) can receive four analog signals (three phases
and one neutral value), either voltage or current, see
information about every aspect of the 3ph analog signals acquired (phase angle, RMS value,
frequency and frequency derivates etc. – 244 values in total). The BLOCK input will reset all outputs
to 0.
The output signals AI1 to AI4 in SMAI_20_x function block are direct outputs of the, in SMT or ACT,
connected input group signals to GRPx_A, GRPx_B, GRPx_C and GRPxN, x=1-12. GRPxN is always the
neutral current. If GRPxN is not connected, the AI4 output is all zero. The AIN output is the
calculated residual sum of inputs GRPxL1, GRPxL2 and GRPxL3 and is equal to output AI4 if all
inputs, including GRPxN, are connected. Note that function block will always calculate the residual
sum of current/voltage if the input is not connected in SMT or ACT. Applications with a few
exceptions shall always be connected to AI3P.
The input signal REVROT is used to reverse the phase order.
16.11 Summation block 3 phase 3PHSUM
16.11.1 Identification
Function description
Summation block 3 phase
16.11.2 Functionality
Summation block 3 phase function 3PHSUM is used to get the sum of two sets of three-phase
analog signals (of the same type) for those IED functions that might need it.
564
AnalogInputType setting of a SMAI block is set to Current , the
Even if the
MinValFreqMeas setting is still visible. This means that the minimum level for
current amplitude is based on
PP is 20000, the minimum amplitude for current is 20000 * 10% = 2000. This has
practical affect only if the current measuring SMAI would be used as frequency
reference for adaptive DFT which is not recommended, see Setting guidelines.
IEC 61850
identification
3PHSUM
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Voltage base Val PP . For example, if Voltage base Val
Figure 292 and Figure
IEC 60617 ANSI/IEEE C37.2
identification device number
- -
1MRK 506 326-UUS B
GUID-6356F5A5-7A3C-4BDE-B66C-0F4EA394743F v1
SEMOD55746-4 v7
293. SMAI outputs give
GUID-06105A66-A4ED-4752-9A4B-1355AEBB45BC v1
SEMOD55976-4 v3
Line distance protection REL650
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