Name Type Default Description
IREV BOOLEAN 0 A signal that indicates a reverse fault has been
detected and activates current reverasl logic
WEIBLK1 BOOLEAN 0 Block of WEI logic
WEIBLK2 BOOLEAN 0 Block of WEI logic due to operation of other
protections that would effect a pilot trip or the detection
of reverse faults that will be tripped by an external device
LOVBZ BOOLEAN 0 Block of trip from WEI logic through the loss of voltage
(fuse-failure) function
CBOPEN BOOLEAN 0 Block of trip from WEI logic by an open breaker
CRL BOOLEAN 0 POTT or Unblock carrier receive for WEI logic
Table 429: ZCRWPSCH (85) Output signals
Name Type Description
IRVL BOOLEAN Operation of current reversal logic
TRWEI BOOLEAN Trip of WEI logic
TRWEI_A BOOLEAN Trip of WEI logic in phase A
TRWEI_B BOOLEAN Trip of WEI logic in phase B
TRWEI_C BOOLEAN Trip of WEI logic in phase C
ECHO BOOLEAN A signal that indicates channel start (CS) by WEI logic
13.3.5 Setting parameters
Table 430: ZCRWPSCH (85) Group settings (basic)
Name
Values (Range) Unit Step Default Description
CurrRev Disabled
Enabled
- - Disabled 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 Disabled
Echo
Echo & Trip
- - Disabled Operating mode of WEI logic
tPickUpWEI 0.000 - 60.000 s 0.001 0.010 Coordination time for the WEI logic
VBase 0.05 - 2000.00 kV 0.05 400.00 Base setting for voltage level
PU27PP 10 - 90 %VB 1 70 Phase to Phase voltage for detection of fault
condition
PU27PN 10 - 90 %VB 1 70 Phase to Neutral voltage for detection of fault
condition
1MRK505222-UUS C Section 13
Scheme communication
807
Technical reference manual
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