ABB rec670 Applications Manual

15.1.3.6 Intertrip scheme
M13869-62 v5
Set
Operation = Enabled
Set SchemeType = Intertrip
Set tCoord = 50 ms (10 ms + maximal transmission time)
Set
tSendMin = 0.1 s (0 s in parallel line applications)
Set
Unblock = Disabled
Set tSecurity = 0.015 s
15.2 Current reversal and Weak-end infeed logic for
distance protection 3-phase ZCRWPSCH (85)
IP15751-1 v4
15.2.1
Identification
M15073-1 v5
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current reversal and weak-end infeed
logic for distance protection 3-phase
ZCRWPSCH - 85
15.2.2 Application
IP15023-1 v1
15.2.2.1 Current reversal logic
M13895-4 v6
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 193
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.
Section 15 1MRK 511 401-UUS A
Scheme communication
474 Bay control REC670 2.2 ANSI
Application manual

ABB rec670 Specifications

General

Brand	ABB
Model	rec670
Category	Control Unit
Language	English