ABB RES670 Technical Manual page 158

Section 7
Impedance protection
152
DET-A
DET-B
DET-C
ANSI01000057 V2 EN-US
Figure 39: Detection of power swing for 1-of-3 and 2-of-3 operating mode
ZOUT_A
ZOUT_B
ZOUT_C
TRSP
0
0-tGF
I0CHECK
BLK_I0
BLK_SS
BLOCK
DET1of3 - int.
REL1PH
BLK1PH
DET2of3 - int.
REL2PH
BLK2PH
EXT_PSD
ANSI05000114 V2 EN-US
Figure 40: Simplified block diagram for ZMRPSB (68) function
DET1of3 - int.
OR
AND
DET2of3 - int.
AND OR
AND
OR
ZIN_A
ZIN_B
AND
ZIN_C
AND
10ms
AND
OR
0
0-tR1
AND
0
-loop
0-tR2
AND
0
-loop
AND
0
OR
0-tH
AND
1MRK 511 408-UUS A
ANSI01000057-2-en.vsd
OR
INHIBIT
OR
OR
PICKUP
AND
en05000114-1-ansi.vsd
Phasor measurement unit RES670 2.2 ANSI
Technical manual
ZOUT
ZIN