ABB REC650 - Page 210

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