Intertrip Scheme - ABB REC670 Applications Manual

Section 15
Scheme communication
15.1.3.6
15.2
15.2.1
15.2.2
15.2.2.1
474

Intertrip scheme

Operation Enabled
Set =
Set SchemeType = Intertrip
tCoord
Set = 50 ms (10 ms + maximal transmission time)
tSendMin
Set = 0.1 s (0 s in parallel line applications)
Unblock Disabled
Set =
Set tSecurity = 0.015 s
Current reversal and Weak-end infeed logic for
distance protection 3-phase ZCRWPSCH (85)
Identification
Function description
Current reversal and weak-end infeed
logic for distance protection 3-phase
Application
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
and Figure 194. 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.
IEC 61850 IEC 60617
identification identification
ZCRWPSCH -
1MRK 511 401-UUS A
M13869-62 v5
IP15751-1 v4
M15073-1 v5
ANSI/IEEE C37.2
device number
85
IP15023-1 v1
M13895-4 v6
193
Bay control REC670 2.2 ANSI
Application manual