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1MRK 505 370-UEN D
UL1L2
TRM_40.CH7(U)
IEC10000060 V3 EN-US
Figure 229: Connection example
20.11.3
Setting guidelines
The parameters for the signal matrix for analog inputs (SMAI) functions are set via the local
HMI or PCM600.
Every SMAI function block can receive four analog signals (three phases and one neutral value),
either voltage or current. SMAI outputs give information about every aspect of the 3ph analog
signals acquired (phase angle, RMS value, frequency and frequency derivates, and so on – 244
values in total). Besides the block "group name", the analog inputs type (voltage or current)
and the analog input names that can be set directly in ACT.
Application functions should be connected to a SMAI block with same task cycle as the
application function, except for e.g. measurement functions that run in slow cycle tasks.
DFTRefExtOut : Parameter valid only for function block SMAI1 .
Reference block for external output (SPFCOUT function output).
DFTReference : Reference DFT for the SMAI block use.
These DFT reference block settings decide DFT reference for DFT calculations. The setting
InternalDFTRef will use fixed DFT reference based on set system frequency. DFTRefGrp(n) will
use DFT reference from the selected group block, when own group is selected, an adaptive
DFT reference will be used based on calculated signal frequency from own group. The setting
ExternalDFTRef will use reference based on what is connected to input DFTSPFC.
The setting
Ph-N or Ph-Ph ). Depending on connection type setting the not connected Ph-N or Ph-Ph
outputs will be calculated as long as they are possible to calculate. E.g. at
Busbar protection REB670
Application manual
SMAI1
SPFCOUT
BLOCK
DFTSPFC
G1AI3P
REVROT
G1AI1
PHASEL1
G1AI2
^GRP1L1
G1AI4
PHASEL2
G1N
^GRP1L2
PHASEL3
^GRP1L3
NEUTRAL
^GRP1N
The above described scenario does not work if SMAI setting
Ph-N . If only one phase-earth voltage is available, the same type of connection
can be used but the SMAI
has to be accounted for when setting
ConnectionType is Ph-N and the same voltage is connected to all three SMAI
inputs, the positive sequence voltage will be zero and the frequency functions
will not work properly.
The outputs from the above configured SMAI block shall only be used for
Overfrequency protection (SAPTOF), Underfrequency protection (SAPTUF) and
Rate-of-change frequency protection (SAPFRC) due to that all other
information except frequency and positive sequence voltage might be wrongly
calculated.
ConnectionType : Connection type for that specific instance (n) of the SMAI (if it is
SAPTOF
U3P*
TRIP
START
BLOCK
BLKTRIP
BLKDMAGN
FREQ
ConnectionType setting must still be Ph-Ph and this
MinValFreqMeas . If SMAI setting
Section 20
Basic IED functions
SAPTOF(1)_TRIP
EC10000060-3-en.vsdx
ConnectionType is
GUID-C8D6C88B-87C6-44C1-804B-CF1594365EE6 v8
Ph-Ph connection L1,
437
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