Thytronic NC20 - Page 69

69
NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
46NS2.ai
I
NC
RESET
t
N>>def
0T
≥1
Start IN>>
Trip IN>>
CB-State
ON≡Enable IN>> unbalance current element
(Pickup within CLP)
(Pickup outside CLP)
&
T0
t
NCLP>>
INCLP>>Mode
I
NCLP >>def
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>>
I
NC
≥ I
N
>
def
I
N
>>
def
I
NC
≥ I
NCLP >>def
t
N>>def
Neutral unbalance current (46N) - Second element logic diagram (IN>>)
Binary input INx
T0
Logic
INx t
ON
INx t
ON
INx t
OFF
T0
n.o.
n.c.
INx t
OFF
BLK1IN>>
&
&
&
Enable (ON≡Enable)
IN>>BLK1
Block1
Start I
N
>>
Trip I
N
>>
Block1
Block1
&
(ON≡
Inhibit )
Start I
N
>>
IN>AL inhibition
IN>AL disbyl>>
&
(ON≡
Inhibit )
Start I
N
>>
IN> inhibition
IN> disbyl>>