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67
NC20 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
46NS1.ai
R E S E T
t
N>
0
T
≥
1
Start IN>
Trip IN>
CB-State
ON
≡
Inhibit (from IN>> element)
ON
≡
Enable IN> unbalance current element
IN> inhibition
&
T
0
t
NCLP>
INCLP>Mode
t
NCLP>
TRIP
P
ING
M
A
TRIX
(LED
+R
EL
A
Y
S
)
A
B
C
A =“1”
A =“0 or OFF”
Output
t
NCLP>
IN> Enable
t
NCLP>
CB State
CB OPEN
CB CLOSED
CB OPEN
Output t
NCLP>
t
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
HIGH THRESHOLD/
BLOCK
A = ON - Change setting
B = OFF
C = ON - Element blocking
IN>TR-K
IN>TR-L
IN>ST-L
IN>ST-K
≥
1
CLP IN>
t
N>def
t
N>inv
Neutral unbalance current (46N) - First element logic diagram (IN>)
I
N
> Curve
0
T
&
(ON
≡
Inhibit)
Start
I
N
>
IN>AL inhibition
IN>AL disbyl>
I
N C
I
N C
≥
I
N
>
def
I
N C
≥
I
N
>
inv
≥
1
(Pickup within CLP)
(Pickup outside CLP)
I
NC L P >def
I
NC L P >inv
&
State
I
N
>
def
I
N C
≥
I
NCLP
>
(def/inv)
I
N
>
def
&
State
Block1, Block2
IN> element (46N) block diagram