ABB REL650 Technical Manual page 832

Section 19
Basic IED functions
19.9
19.9.1
19.9.2
19.9.3
826
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
REVROT
^G1AI3P*
^G2AI3P*
IEC05000441-3-en.vsdx
IEC05000441 V3 EN-US
Figure 394: 3PHSUM function block
Signals
Table 620: 3PHSUM Input signals
Name Type
BLOCK BOOLEAN
BLKGR1 BOOLEAN
BLKGR2 BOOLEAN
REVROT BOOLEAN
G1AI3P GROUP
SIGNAL
G2AI3P GROUP
SIGNAL
AI3P
AI1
AI2
AI3
AI4
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 506 382-UEN A
PID-6428-INPUTSIGNALS v3
Line distance protection REL650 2.2 IEC
Technical manual
SEMOD55968-1 v2
SEMOD55976-4 v4
SEMOD54885-4 v3
SEMOD55989-1 v2