ABB Relion REC670 - 14.2 Current reversal and Weak-end infeed logic for distance protection 3-phase ZCRWPSCH

14.1.3.3 Permissive underreaching scheme
M13869-25 v4
Set Operation = On
Set SchemeType = Permissive UR
Set tCoord = 0 ms
Set tSendMin = 0.1 s
Set Unblock = Off
Set tSecurity = 0.035 s
14.1.3.4 Permissive overreaching scheme
M13869-34 v4
Set Operation = On
Set Scheme type = Permissive OR
Set tCoord = 0 ms
Set tSendMin = 0.1 s (0 s in parallel line applications)
Set Unblock = Off
Set tSecurity = 0.035 s
14.1.3.5 Unblocking scheme
M13869-43 v4
Set Unblock = Restart
(Loss of guard signal will give both trip and alarm
Choose NoRestart if only trip is required)
Set tSecurity = 0.035 s
14.1.3.6 Intertrip scheme
M13869-62 v4
Set Operation = On
Set SchemeType = Intertrip
Set tCoord 50 ms (10 ms + maximal transmission time)
Set tSendMin = 0.1 s (0 s in parallel line applications)
Set Unblock = Off
Set tSecurity = 0.015 s
14.2 Current reversal and Weak-end infeed logic for
distance protection 3-phase ZCRWPSCH
IP15751-1 v4
14.2.1 Identification
M15073-1 v5
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current reversal and weak-end
infeed logic for distance protection
3-phase
ZCRWPSCH - 85
1MRK 511 358-UEN A Section 14
Scheme communication
347
Application manual