90
FUNCTION CHARACTERISTICS
Breaker failure (BF)
Each thresholds (U/f>, U/f>>) can be associated to BF (H) and BF (L) protection by activating the
relative parameter in the matrices “Selection of function tripping for BF (H)” or “Selection of function
tripping for BF (L)” in relevant BF menus
2
:
• Set \ Profile A (or B) \ Breaker failure - BF side H
• Set \ Profile A (or B) \ Breaker failure - BF side L
Fun-F24_S3.ai
U/f > (U/f)>
&
RESET
t
U/f>>
0T
TRIPPING MATRIX
(LED+RELAYS)
U/f>>
U/f>> Trip
t
U/f>>
&
(ON≡
Inhibit
)
U/f> Inhibition
&
(ON≡
Inhibit
)
U/fAL Inhibition
U/f>> Start
Alarm inhibition
1st element inhibition
U/f
F24S2 Block3
IF Start
=0 if 20≤f≤70 Hz
U/f>> Block1
U/f>> Start
U/f>> Trip
U/f>> Start
U/f>> Trip
&
&
&
Enable (ON≡Enable)
Block1
Block1
Block1
Binary input INx (x=1...8-16)
T 0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T0
n.o.
n.c.
INx
t
OFF
Overfluxing protection (24) - Second element logic diagram
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021
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