Delta Blocking Scheme - ABB REC670 Applications Manual

1MRK 511 401-UUS A
15.1.3.2
15.1.3.3
15.1.3.4
15.1.3.5
Bay control REC670 2.2 ANSI
Application manual

Delta blocking scheme

Operation Enabled
Set =
Set SchemeType = DeltaBlocking
tCoord
Set = 0 s
tSendMin
Set = 0 s
Unblock Disabled
Set =
(Set to
used.
Set to
tSecurity
Set = 0.035 s
DeltaI
Set = 10 %IB
Set DeltaV = 5 %VB
Delta3I0
Set = 10 %IB
Delta3V0
Set = 5 %VB
Permissive underreaching scheme
Operation Enabled
Set =
SchemeType Permissive UR
Set =
Set tCoord = 0 ms
tSendMin
Set = 0.1 s
Unblock Disabled
Set =
tSecurity
Set = 0.035 s
Permissive overreaching scheme
Operation Enabled
Set =
Set Scheme type = Permissive OR
tCoord
Set = 0 ms
tSendMin
Set = 0.1 s (0 s in parallel line applications)
Unblock Disabled
Set =
Set tSecurity = 0.035 s
Unblocking scheme
Set Unblock = Restart
(Loss of guard signal will give both trip and alarm
Choose
tSecurity
Set = 0.035 s
NoRestart if Unblocking scheme with no alarm for loss of guard is to be
Restart if Unblocking scheme with alarm for loss of guard is to be used)
NoRestart if only trip is required)
Section 15
Scheme communication
GUID-F4359690-F433-46CB-A173-8C14559E3FCF v1
M13869-25 v4
M13869-34 v4
M13869-43 v4
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