Summation Block 3 Phase 3Phsum - ABB Relion 650 Series Technical Manual

Section 15
Basic IED functions
15.9
15.9.1
15.9.2
15.9.3
642
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.

Summation block 3 phase 3PHSUM

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.
Function block
3PHSUM
BLOCK SPFCOUT
BLKGR1 AI3P
BLKGR2 AI1
REVROT AI2
^G1AI3P* AI3
^G2AI3P* AI4
IEC05000441-4-en.vsdx
IEC05000441 V4 EN-US
Figure 288: 3PHSUM function block
Signals
Table 520: 3PHSUM Input signals
Name Type
BLOCK BOOLEAN
BLKGR1 BOOLEAN
BLKGR2 BOOLEAN
REVROT BOOLEAN
G1AI3P GROUP
SIGNAL
G2AI3P GROUP
SIGNAL
Default Description
0 Block
0 Block input for group 1
0 Block input for group 2
0 Reverse rotation
- Group 1 three phase analog input from first SMAI
- Group 2 three phase analog input from second
SMAI
1MRK 511 424-UEN B
SEMOD55968-1 v2
SEMOD55976-4 v4
SEMOD54885-4 v4
SEMOD55989-1 v2
PID-6428-INPUTSIGNALS v3
Bay control REC650 2.2 IEC
Technical manual