ABB REB650 - Page 103

a
b
a>b
OR
|I
OP
|
PU_STx
T
R
S
T
x
AND
AND
Pickupx
BLKx
BLOCK
Characteristx=DefTime
DirModeSelx=Disabled
DirModeSelx=Non-directional
DirModeSelx=Forward
DirModeSelx=Reverse
AND
AND
FORWARD_Int
REVERSE_Int
OR
BLKTR
OR
STAGEx_DIR_Int
ANSI11000281-1-en.vsd
AND
AND
Characteristx=Inverse
Inverse
ANSI11000281-1-en.vsd
0
0-tx
0
0-txMin
ANSI11000281 V1 EN
Figure 38: Operating characteristic for ground-fault directional element using the
zero sequence components
1MRK 505 277-UUS C Section 7
Current protection
97
Technical Manual