ABB REC650 Technical Manual page 210

Relion 650 series bay control
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Section 9
Secondary system supervision
204
Fuse failure detection
Main logic
TEST
TEST ACTIVE
AND
BlocFuse = Yes
BLOCK
All UL < USealIn<
SealIn = On
Any UL < UsealIn<
FuseFailDetDUDI
AND
OpDUDI = On
FuseFailDetZeroSeq
AND
AND
FuseFailDetNegSeq
AND
UNsINs
UZsIZs
UZsIZs OR UNsINs
OpMode
UZsIZs AND UNsINs
OptimZsNs
CurrZeroSeq
a
a>b
CurrNegSeq
b
DeadLineDet1Ph
MCBOP
60 sec
t
All UL > UsealIn<
VoltZeroSeq
OR
VoltNegSeq
AllCurrLow
CBCLOSED
DISCPOS
IEC10000041 V1 EN
Figure 93:
Simplified logic diagram for fuse failure supervision function, Main
logic
OR
OR
AND
AND
5 s
OR
t
OR
OR
AND
AND
200 ms
AND
t
150 ms
t
OR
AND
5 sec
t
1MRK 511 287-UEN A
intBlock
AND
AND
AND
OR
AND
OR
IEC10000041-1-en.vsd
Technical manual
BLKZ
BLKU

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