Thytronic NG10 - 4.4 PROTECTIVE ELEMENTS; Breaker Failure (BF) Logic Diagram

FUNCTION CHARACTERISTICS
71
NG10 - Manual - 04 - 2022
Fun-BF_Pro-n.ai
TRIPPING MATRIX (LED+RELAYS)
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
RESET
tBF
0T
t
BF
≥ 1
≥ 1
Binary input INx
T 0
Logic
INx t
ON
INx t
ON
INx t
OFF
T0
n.o.
n.c.
INx t
OFF
Binary input INx
T 0
Logic
INx t
ON
INx t
ON
INx t
OFF
T0
n.o.
n.c.
INx t
OFF
Binary input INx
T 0
Logic
INx t
ON
INx t
ON
INx t
OFF
T0
n.o.
n.c.
INx t
OFF
52b
Binary input INx
T 0
Logic
INx t
ON
INx t
ON
INx t
OFF
T0
n.o.
n.c.
INx t
OFF
52b
“0”
CB Input
CB Input OFF
CB Input ON
Logic diagram concerning the breaker failure element -BF