Setting Guidelines - ABB REC670 Applications Manual

Section 23
Basic IED functions
23.11.3
584
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 GRPxL1,
GRPxL2 and GRPxL3 to the same voltage input as shown in figure
SMAI calculate a positive sequence voltage.
BLOCK
DFTSPFC
UL1L2
REVROT
PHASEL1
^GRP1L1
TRM_40.CH7(U)
PHASEL2
^GRP1L2
PHASEL3
^GRP1L3
NEUTRAL
^GRP1N
IEC10000060 V3 EN-US
Figure 242: Connection example
The above described scenario does not work if SMAI setting
ConnectionType is Ph-N. If only one phase-earth voltage is
available, the same type of connection can be used but the SMAI
ConnectionType setting must still be Ph-Ph and this has to be
accounted for when setting MinValFreqMeas. If SMAI 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.

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.
SMAI1
SPFCOUT
G1AI3P
U3P*
BLOCK
G1AI1
BLKTRIP
G1AI2
G1AI4
G1N
1MRK 511 401-UEN A
242 to make
SAPTOF
TRIP SAPTOF(1)_TRIP
START
BLKDMAGN
FREQ
EC10000060-3-en.vsdx
GUID-C8D6C88B-87C6-44C1-804B-CF1594365EE6 v8
Bay control REC670 2.2 IEC
Application manual