ABB Relion 670 Series Applications Manual page 447

1MRK 511 401-UEN Rev. K
16.1.3.4 Permissive overreaching scheme
Operation
Set
Scheme type
Set
tCoord
Set
tSendMin
Set
Unblock
Set
tSecurity
Set
16.1.3.5 Unblocking scheme
Unblock
Set
tSecurity
Set
16.1.3.6 Intertrip scheme
Operation
Set
SchemeType
Set
tCoord
Set
tSendMin
Set
Unblock
Set
tSecurity
Set
16.2 Current reversal and Weak-end infeed logic for
distance protection 3-phase ZCRWPSCH
16.2.1 Identification
Function description
Current reversal and weak-end
infeed logic for distance protection
3-phase
16.2.2 Application
16.2.2.1 Current reversal logic
To avoid this kind of disturbances, a fault current reversal logic (transient blocking logic) can
be used.
The unwanted operations that might occur can be explained by looking into Figure
Figure 228. Initially the protection A2 at A side will detect a fault in forward direction and send
a communication signal to the protection B2 at remote end, which is measuring a fault in
reverse direction.
Bay control REC670
Application manual
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
NoRestart if only trip is required)
Choose
= 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
© Copyright 2017 Hitachi Power Grids. All rights reserved
IEC 60617 ANSI/IEEE C37.2
identification device number
- 85
Section 16
Scheme communication
M13869-34 v4
M13869-43 v4
M13869-62 v5
IP15751-1 v4
M15073-1 v5
IP15023-1 v1
M13895-4 v6
227 and
441