Setting Guidelines - ABB REB670 Applications Manual

Section 18
Basic IED functions
18.13.3
470
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
positive sequence voltage.
BLOCK
DFTSPFC
VAB
REVROT
PHASEA
^GRP1_A
TRM_40.CH7(U)
PHASEB
^GRP1_B
PHASEC
^GRP1_C
NEUTRAL
^GRP1_N
ANSI10000060 V1 EN
Figure 194: Connection example
The above described scenario does not work if SMAI setting
ConnectionType is Ph-N. If only one phase-ground 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, 81), Underfrequency protection
(SAPTUF, 81) and Rate-of-change frequency protection (SAPFRC, 81)
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,
SMAI1
SPFCOUT
G1AI3P
V3P*
BLOCK
G1AI1
BLKTRIP
G1AI2
G1AI4
G1N
1MRK 505 337-UUS -
194 to make SMAI calculate a
SAPTOF
TRIP SAPTOF(1)_TRIP
PICK UP
BLKDMAGN
FREQ
ANSI10000060-1-en.vsdx
Application manual