FUNCTION CHARACTERISTICS
69
NA30 - Manual - 04 - 2022
Phase overcurrent (50/51) - Logic diagram of the blocking signals concerning the third element (I>>>)
Pilot wire output
TRIPPING MATRIX
(LED+RELAYS)
ModeBLOUT1
A
B
C
D
BLOUT1
Block2 output
≥1
t
F-IPh
t
F-IPh/IE
t
F-IE
ST-Iph BLK2
ST-IE BLK2
&
Block2 output
(ON≡Enable)
I>>>BLK2OUT
Start I>>>
≥1
T 0
t
F-IPh/IE
T 0
t
F-IPh
T 0
t
F-IE
I> Block2 OUT
BLK2OUT-Iph
BLK2OUT-Iph/IE
BLK2OUT-IE
A = OFF
B = ON IPh
C = ON IPh/IE
D = ON IE
BLK2OUT-IPh-K
BLK2OUT-IPh-L
BLK2OUT-IPh/IE-K
BLK2OUT-IPh/IE-L
BLK2OUT-IE-K
BLK2OUT-IE-L
Binary input INx (x=1,...5)
T 0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T0
n.o.
n.c.
INx
t
OFF
Binary input INx (x=1,...5)
T 0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T0
n.o.
n.c.
INx
t
OFF
Binary input INx (x=1,...5)
T 0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T0
n.o.
n.c.
INx
t
OFF
Binary input INx (x=1,...5)
T 0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T0
n.o.
n.c.
INx
t
OFF
Block2 IPh
Block2 IPh/IE
ModeBLIN1
T 0
t
B-Iph
50-51S3_BL-diagram.ai
≥1
≥1
≥1
≥1
t
B-Iph
t
FI-Iph
t
B-IE
BLK1I>>>
BLK4IN I>>>
&
&
&
BLK2IN I>>>
&
&
Enable (ON≡Enable)
I>>>BLK1
Block2 input enable (ON≡Enable)
Pilot wire input
&
I>>>BLK2IN
Block1
BLK2IN-Iph
Start I>>>
Trip I>>>
ST-IE BLK4
ST-Iph BLK4
Iph Block2
IE Block2
Block4 enable
BLK2IN-IE
tB timeout
Block2 input
tB-K
tB-L
Block1
FROM EARTH FAULT PROTECTIONS
FROM ANY PROTECTIONS
OFF
ON IPh
ON IPh/IE
ON IE
BLIN1
≥1
≥1
t
FI-IE
Block4 OUT
≥1
T 0
t
FI-Iph
T 0
t
FI-IE
I>> Block4 I/O
I> Block4 I/O
I>>> Block4 OUT
Block4
Block4
I>>> Block4 I/O
DthAL1 Block4 I/O
DthAL2 Block4 I/O
Dth Block4 I/O
I>> Block2 OUT
I>>> Block2 OUT
DthAL1 Block2 OUT
DthAL2 Block2 OUT
Dth Block2 OUT
I
E
>> Block4 I/O
I
E
> Block4 I/O
I
E
>>> Block4 I/O
I
ED
>> Block4 I/O
I
ED
> Block4 I/O
I
ED
>>> Block4 I/O
I
ED
>>>> Block4 I/O
≥1
I
E
>> Block2 OUT
I
E
> Block2 OUT
I
E
>>> Block2 OUT
I
ED
>> Block2 OUT
I
ED
> Block2 OUT
I
ED
>>> Block2 OUT
I
ED
>>>> Block2 OUT
Block4
Block1
T 0
t
B-IE
Block2 IE
≥1
Block1, Block2, Block4
TRIPPING MATRIX
(LED+RELAYS)
≥1
≥1
A = IN
B = OFF
C = OUT
A = IN
B = OFF
C = OUT
I>>>BLK4
Start I>>>
C
B
A
“0”
“0”
B
C
“0”
“0”
I>>>BLK4
A
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