Logic Diagram - ABB REL 501-C1 2.5 Technical Reference Manual

5.4
Power swing detection (PSD)

Logic diagram

ZOUTLn
ZINLn
PSD-CONS.-int.
PSD-DET-L1
PSD-DET-L2
PSD-DET-L3
ZOUTL1
ZOUTL2
ZOUTL3
PSD--TRSP
PSD--I0CHECK
PSD--START
PSD--BLKI02
PSD--BLKI01
PSD--BLOCK
DET1of3 - int.
PSD--REL1PH
PSD--BLK1PH
DET2of3 - int.
PSD--REL2PH
PSD--BLK2PH
PSD--EXTERNAL
Figure 38: PSD function - block diagram.
tP1
&
tP2
&
DET1of3 - int.
≥1
&
&
&
≥1
ZINL1
ZINL2
&
ZINL3
tEF
t
&
10 ms
&
t
>1
tR1
&
t
tR2
&
t
&
tH
>1
t
&
Line distance
t
≥1
t
&
PSD-DET-Ln
DET2of3 - int.
≥1
PSD--ZOUT
PSD--ZIN
≥1
>1
PSD - CONS. - int.
>1 PSD--START
&
en01000059.vsd
Chapter 4
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