ABB RED650 Technical Manual page 142

Section 7
Impedance protection
136
TimerModeZx =
Enable PhPh or
Ph-E PhPh
PPZx AND
PEZx
AND
BLOCK
VTSZ
BLKZx OR
BLKTRZx
ZoneLinkStart
Phase Selection
1st starting zone
External start
LNKZ2
OR
LNKZ4
LNKZ5
EXTNST
IEC12000139 V4 EN-US
Figure 56: Logic for linking of timers
tPPZx
OR AND
AND
t
tPEZx
OR
AND
t
AND
TimerLinksZx
OR
LoopLink (tPP-tPE)
LoopLink & ZoneLink
OR
No Links
FALSE (0)
TimerLinksZx =
LoopLink & ZoneLink
Line differential protection RED650 2.2 IEC
1MRK 505 394-UEN A
OR
LNKZx
AND
IEC12000139-4-en.vsdx
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