ABB RET650 Technical Manual page 135

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