ABB REL650 - Delta Blocking Scheme

Set tSendMin = 0 s
Set Unblock = Disabled
(Set to NoRestart if Unblocking scheme with no alarm for loss of guard is to be
used.
Set to
Restart if Unblocking scheme with alarm for loss of guard is to be used)
Set
tSecurity = 0.035 s
12.1.3.2 Delta blocking scheme
Set Operation = Enabled
Set SchemeType = DeltaBlocking
Set tCoord = 0 s
Set tSendMin = 0 s
Set Unblock = Disabled
(Set to NoRestart if Unblocking scheme with no alarm for loss of guard is to be
used.
Set to
Restart if Unblocking scheme with alarm for loss of guard is to be used)
Set
tSecurity = 0.035 s
Set DeltaI = 10 %IB
Set DeltaV = 5 %VB
Set Delta3I0 = 10 %IB
Set Delta3V0 = 5 %VB
12.1.3.3 Permissive underreaching scheme
Set
Operation = Enabled
Set SchemeType = Permissive UR
Set tCoord = 0 ms
Set tSendMin = 0.1 s
Set Unblock = Disabled
Set tSecurity = 0.035 s
12.1.3.4 Permissive overreaching scheme
Set
Operation = Enabled
Set Scheme type = Permissive OR
Set tCoord = 0 ms
Set tSendMin = 0.1 s (0 s in parallel line applications)
Set Unblock = Disabled
Set tSecurity = 0.035 s
Section 12 1MRK 506 334-UUS A
Scheme communication
398
Application manual