ABB RELION 670 Series Technical Manual page 471

1MRK 502 066-UUS B
|I |
OP
Pickupx
DirModeSelx=Disa bled
DirModeSelx=Non-dire ctional
DirModeSelx=Forward
DirModeSelx=Reverse
ANSI12000008 V3 EN-US
Figure 249: Simplified logic diagram for OC4PTOC
I3P
V3P
AngleRCA
AngleROA
PUminOpPhSel
ANSI15000266 V1 EN-US
Figure 250: OC4 directional release block diagram
Technical manual
Characteristx=DefTime
a
a>b
b
AND
Characteristx=Inve rse
OR STAGE x_DIR_Int
AND
OR
FORWARD_Int
AND
REVERSE_Int
DFWDLx
DFWDLxx
DREVLx
Directional
Element
DREVLxx
STLx
Greater
Comparator
AND
OR
0-txMin
AND
0
Inve rse
ANSI12000008-3-en.vsd
Directional
Release
Block
x- means three phases 1,2 and 3
xx – means phase to phase 12,23,31
Section 8
Current protection
0-tx
0
PUx
STx
ANSI12000008-3-en.vsd
FORWARD_int
REVERSE_int
ANSI15000266-1-en.vsdx
465