Thytronic NC20 - Page 67

67
NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
46NS1.ai
RESET
t
N>
0T
≥1
Start IN>
Trip IN>
CB-State
ON≡Inhibit (from IN>> element)
ON≡Enable IN> unbalance current element
IN> inhibition
&
T0
t
NCLP>
INCLP>Mode
t
NCLP>
TRIPPING MATRIX (LED+RELAYS)
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
0T
&
(ON≡
Inhibit )
Start I
N
>
IN>AL inhibition
IN>AL disbyl>
I
NC
I
NC
≥ I
N
>
def
I
NC
≥ I
N
>
inv
≥1
(Pickup within CLP)
(Pickup outside CLP)
I
NCL P >def
I
NCL P >inv
&
State
I
N
>
def
I
NC
≥ I
N CLP
>
(def/inv)
I
N
>
def
&
State
Block1, Block2
IN> element (46N) block diagram