ABB Relion 670 Series Technical Reference Manual page 812

Section 13
Scheme communication
13.3.3
13.3.4
806
IEC00000551-TIFF V1 EN
Figure 397: Tripping part of the WEI logic, simplified diagram
Function block
ZCRWPSCH (85)
V3P* IRVL
BLOCK TRWEI
IFWD TRWEI_A
IREV TRWEI_B
WEIBLK1 TRWEI_C
WEIBLK2 ECHO
LOVBZ
CBOPEN
CRL
ANSI06000287-2-en.vsd
ANSI06000287 V2 EN
Figure 398: ZCRWPSCH (85) function block
Input and output signals
Table 428: ZCRWPSCH (85) Input signals
Name Type
V3P GROUP
SIGNAL
BLOCK BOOLEAN
IFWD BOOLEAN
Table continues on next page
Default Description
- Group signal for voltage input
0 Block of function
0 A signal that indicates a forward fault has been
detected and will block tripping if there was a pre-
existing reverse fault condition (IREV)
1MRK505222-UUS C
Technical reference manual