FUNCTION CHARACTERISTICS
108
NA30 - Manual - 04 - 2022
Logic diagram concerning the breaker failure element -BF
Fun-BF_Pro-n.ai
TR
IP
PIN
G
M
AT
RIX
(
LE
D+R
EL
AY
S)
Start BF
Start IBF>
Trip BF
Trip int-prot
&
&
&
&
Block1 input (ON
≡
Block)
BLK1 BF
Trip Int/Ext
Block1
Start BF
ON
≡
CB Closed
Start BF
Trip BF
Trip BF
Trip ProtExt
52a
&
Block1 enable (ON
≡
Enable)
BF-BLK1
Block1
52a
I
BF
>
Max
I
L1
...
I
L3
≥
I
BF
>
I
L1
I
L2
I
L3
I
EBF
>
I
E
≥
I
EBF
>
I
E
≥
1
RESET
t
BF
0
T
t
BF
≥
1
Binary input INx
T
0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T
0
n.o.
n.c.
INx
t
OFF
Binary input INx
T
0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T
0
n.o.
n.c.
INx
t
OFF
Binary input INx
T
0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T
0
n.o.
n.c.
INx
t
OFF
52b
Binary input INx
T
0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T
0
n.o.
n.c.
INx
t
OFF
52b
Start IEBF>
“0”
CB Input
CB Input OFF
CB Input ON