PID-3521-OUTPUTSIGNALS v8
Table 231: ZCRWPSCH Output signals
Name Type Description
IRVL BOOLEAN Operation of current reversal logic
TRWEI BOOLEAN Trip signal from weak end infeed logic
TRWEIL1 BOOLEAN Trip signal from weak end infeed logic in phase
L1
TRWEIL2 BOOLEAN Trip signal from weak end infeed logic in phase
L2
TRWEIL3 BOOLEAN Trip signal from weak end infeed logic in phase
L3
ECHO BOOLEAN Carrier send by WEI logic
13.2.5 Settings
PID-3521-SETTINGS v8
Table 232: ZCRWPSCH Group settings (basic)
Name Values (Range) Unit Step Default Description
CurrRev Off
On
- - Off Operating mode of Current Reversal
Logic
tPickUpRev 0.000 - 60.000 s 0.001 0.020 Pickup time for current reversal logic
tDelayRev 0.000 - 60.000 s 0.001 0.060 Time Delay to prevent Carrier send and
local trip
WEI Off
Echo
Echo & Trip
-
- Off Operating mode of WEI logic
tPickUpWEI 0.000 - 60.000 s 0.001 0.010 Coordination time for the WEI logic
UPP< 10 - 90 %UB 1 70 Phase to Phase voltage for detection of
fault condition
UPN< 10 - 90 %UB 1 70 Phase to Neutral voltage for detection of
fault condition
Table 233: ZCRWPSCH Non group settings (basic)
Name
Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 12 - 1 1 Selection of one of the Global Base
Value groups
13.2.6 Operation principle
13.2.6.1 Current reversal logic
M16679-3 v8
The current reversal logic can be enabled by setting the parameter CurrRev = On.
The current reversal logic uses a reverse zone connected to the input IRV to
recognize the fault on the parallel line in any of the phases.When the reverse zone
1MRK 505 394-UEN A Section 13
Scheme communication
Line differential protection RED650 2.2 IEC 411
Technical manual
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