FUNCTION CHARACTERISTICS
115
NVA100X-D - Manual - 02 - 2016
Negative sequence overcurrent (46M) - Logic diagram of the second threshold (I2>>)
Starting control set
S t ar t i ng
de t ec t i o n
Fun-F46M_S2.ai
I
2
t
2 >RES
T
0
R E S E T
t
2
>
0
T
≥
1
t
2 >def
t
2 >inv
t
2 >RES
Start I2>
Trip I2>
ON
≡
Inhibit (from I2>> element)
ON
≡
Enable I2> overcurrent element
(Pickup within CLP)
(Pickup outside CLP)
I2> inhibition
&
I2CLP>Mode
I
2 C L P >def
I
2 C L P >inv
I
2
≥
I
2 C L P
>
d e f ( i n v )
BF Enable (ON
≡
Enable)
I2>BF
towards BF logic
I2> BF
&
Trip I2>
TRIP
P
ING
M
ATRIX
(LED
+R
EL
AY
S
)
I
2
> Curve
0
T
I2> Enable
I2> Negative sequence overcurrent element (46) block diagram
Output t
2CLP>
I2>TR-K
I2>TR-L
I2>ST-L
I2>ST-K
I
2
>
inv
I
2
≥
I
2
>
def
I
2
≥
I
2
>
inv
I
2
>
def
T
0
t
2CLP
>
t
2CLP
>
Block1, Block2
A
B
C
Starting control set
A = ON - Change setting
B = OFF
C = ON - Element blocking
≥
1
≥
1
A
B
C
A = ON - Change setting
A
B
C
C = ON - Element blocking
A
B
C
B = OFF
&
C L P s o ur ce
M R E nab l e
CB-State
I
R U N
= 0.1
I
B
M a x [
I
L1...
I
L3
] ≥
I
RUN
I
L1...
I
L3
Output
t
CLP
t
CLP
M a x [
I
L1...
I
L3
] ≥
I
RUN
M a x [
I
L1...
I
L3
] ≥
I
RUN
M a x [
I
L1...
I
L3
] <
I
RUN
S t ar t i n g de t ec t i o n
R e s e t C L P t i m e r
CB State
Restarting
CB OPEN
CB CLOSED
CB CLOSED
CB OPEN
t
I
RUN
t
CLP
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
UNBLOCK
UNBLOCK
HIGH THRESHOLD/
BLOCK
HIGH THRESHOLD/
BLOCK
+
U
AUX
-
U
AUX
Motor restar t
Binary input INx
T
0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
0
n.o.
n.c.
INx
t
OFF
Motor restar t
LOW TH.
LOW TH.
