Permissive Underreaching Scheme; Permissive Overreaching Scheme; Unblocking Scheme; Intertrip Scheme - ABB Relion REC670 Applications Manual

1MRK 511 358-UEN A
14.1.3.3

Permissive underreaching scheme

Operation
Set
SchemeType
Set
tCoord
Set
tSendMin
Set
Unblock
Set
tSecurity
Set
14.1.3.4

Permissive overreaching scheme

Set Operation
Scheme type
Set
Set tCoord
tSendMin
Set
Set Unblock
tSecurity
Set
14.1.3.5

Unblocking scheme

Unblock
Set
tSecurity
Set
14.1.3.6

Intertrip scheme

Set Operation
SchemeType
Set
tCoord
Set
tSendMin
Set
Unblock
Set
tSecurity
Set
14.2 Current reversal and Weak-end infeed logic for
distance protection 3-phase ZCRWPSCH
14.2.1

Identification

Function description
Current reversal and weak-end
infeed logic for distance protection
3-phase
Application manual
On
=
Permissive UR
=
= 0 ms
= 0.1 s
Off
=
= 0.035 s
= On
Permissive OR
=
= 0 ms
= 0.1 s (0 s in parallel line applications)
= Off
= 0.035 s
Restart
=
(Loss of guard signal will give both trip and alarm
Choose NoRestart if only trip is required)
= 0.035 s
= On
Intertrip
=
50 ms (10 ms + maximal transmission time)
= 0.1 s (0 s in parallel line applications)
Off
=
= 0.015 s
IEC 61850
identification
ZCRWPSCH
IEC 60617 ANSI/IEEE C37.2
identification device number
- 85
Section 14
Scheme communication
M13869-25 v4
M13869-34 v4
M13869-43 v4
M13869-62 v4
IP15751-1 v4
M15073-1 v5
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