ABB ret650 - Page 135

IEC05000113-2-en.vsd
AND
ZINL1
AND
DET-L1
OR
AND
AND
ZOUTL1
-loop
ZOUTL2
ZOUTL3
OR
detected
OR
-loop
0-tP1
0
0-tP2
0
0
0-tW
IEC05000113 V2 EN
Figure 52: Detection of power swing in phase L1
IEC09000223_2_en.vsd
I0CHECK
AND
BLKI02
t
10 ms
AND
BLKI01
BLOCK
INHIBIT
ZOUTL3
ZOUTL2
ZOUTL1
EXTERNAL
AND
START
ZOUT
ZINL1
ZINL2
ZINL3
ZIN
AND
t
tR1
t
tR2
OR
AND
AND
OR
OR
OR
OR
t
tH
-loop
-loop
DET 1of3 - int
DET 2of3 - int
OR
IEC09000223 V2 EN
Figure 53: Simplified block diagram for ZMRPSB function
1MRK 504 135-UEN A Section 7
Impedance protection
129
Technical manual