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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.
19.9
Summation block 3 phase 3PHSUM
SEMOD55968-1 v2
19.9.1
Functionality
SEMOD55976-4 v4
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.
19.9.2
Function block
SEMOD54885-4 v3
3PHSUM
BLOCK
REVROT
^G1AI3P*
^G2AI3P*
AI3P
AI1
AI2
AI3
AI4
IEC05000441-3-en.vsdx
IEC05000441 V3 EN-US
Figure 394:
3PHSUM function block
19.9.3
Signals
SEMOD55989-1 v2
PID-6428-INPUTSIGNALS v3
Table 620:
3PHSUM Input signals
Name
Type
Default
Description
BLOCK
BOOLEAN
0
Block
BLKGR1
BOOLEAN
0
Block input for group 1
BLKGR2
BOOLEAN
0
Block input for group 2
REVROT
BOOLEAN
0
Reverse rotation
G1AI3P
GROUP
SIGNAL
-
Group 1 three phase analog input from first SMAI
G2AI3P
GROUP
SIGNAL
-
Group 2 three phase analog input from second
SMAI
Section 19
1MRK 506 382-UEN A
Basic IED functions
826
Line distance protection REL650 2.2 IEC
Technical manual
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