ABB Relion 670 Series Applications Manual page 393

1MRK 511 358-UUS A
14.1.3.2 Delta blocking scheme
Operation
Set
SchemeType
Set
Set tCoord
tSendMin
Set
Unblock
Set
Set tSecurity
DeltaI
Set
DeltaV
Set
Delta3I0
Set
Set Delta3V0
14.1.3.3 Permissive underreaching scheme
Set Operation
SchemeType
Set
tCoord
Set
tSendMin
Set
Set Unblock
tSecurity
Set
14.1.3.4 Permissive overreaching scheme
Operation
Set
Scheme type
Set
tCoord
Set
Set tSendMin
Unblock
Set
tSecurity
Set
14.1.3.5 Unblocking scheme
Unblock
Set
tSecurity
Set
Application manual
Enabled
=
DeltaBlocking
=
= 0 s
= 0 s
Disabled
=
NoRestart if Unblocking scheme with no alarm for loss of guard is
(Set to
to be used.
Set to Restart if Unblocking scheme with alarm for loss of guard is to be
used)
= 0.035 s
= 10 %IB
= 5 %VB
= 10 %IB
= 5 %VB
= Enabled
Permissive UR
=
= 0 ms
= 0.1 s
= Disabled
= 0.035 s
Enabled
=
Permissive OR
=
= 0 ms
= 0.1 s (0 s in parallel line applications)
Disabled
=
= 0.035 s
Restart
=
(Loss of guard signal will give both trip and alarm
Choose NoRestart if only trip is required)
= 0.035 s
Section 14
Scheme communication
GUID-F4359690-F433-46CB-A173-8C14559E3FCF v1
M13869-25 v4
M13869-34 v4
M13869-43 v4
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