ABB Relion 670 Series Technical Reference Manual page 393

1MRK505222-UUS C
Technical reference manual
|I |
OP
Pickupx
BLKSTx
BLOCK
DirModeSelx=Disabled
DirModeSelx=Non-directional
DirModeSelx=Forward
DirModeSelx=Reverse
ANSI12000008 V1 EN
Figure 203: Simplified logic diagram for OC4PTOC
Different types of reset time can be selected as described in section
characteristics".
There is also a possibility to activate a preset change (MultiPUx, x= 1, 2, 3 or 4) of the
set operation current via a binary input (enable multiplier). In some applications the
operation value needs to be changed, for example due to changed network switching
state. The function can be blocked from the binary input BLOCK. The pickup signals
from the function can be blocked from the binary input BLK. The trip signals from the
function can be blocked from the binary input BLKTR.
Characteristx=DefTime
a
a>b
b
AND
Characteristx=Inverse
STAGEx_DIR_Int
OR
AND
OR
FORWARD_Int
AND
REVERSE_Int
Current protection
AND
0-tx
OR
0
0-txMin
AND
0
Inverse
ANSI12000008-1-en.vsd
ANSI12000008-1-en.vsd
"Inverse
Section 7
STx
387