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1MRK 505 288-UEN A
Technical manual
BLKTR
|I
|
OP
Ix>
BLKSTx
BLOCK
DirModex=Off
DirModex=Non-directional
DirModex=Forward
DirModex=Reverse
IEC11000281 V1 EN
Figure 39:
Operating characteristic for earth-fault directional element using the
zero sequence components
Characteristx=DefTime
a
a>b
b
AND
Characteristx=Inverse
OR
STAGEx_DIR_Int
AND
OR
FORWARD_Int
AND
REVERSE_Int
Section 7
Current protection
AND
tx
OR
tx
min
AND
Inverse
SimplifiedlogicdiagramforresidualOC
IEC11000281-1-en.vsd
stagex-IEC11000281.vsd
AND
STx
101
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