Thytronic NC20 - Page 102

102
102
NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
Fun_50N-51NS2.ai
t
E>>RES
T0
RESET
t
E>>def
0T
≥1
t
E>>def
t
E>>RES
Start IE>>
Trip IE>>
CB-State
IE>> inhibition
Block1, Block2
&
IE>>TR-K
IE>>TR-L
IE>>ST-L
IE>>ST-K
T0
t
ECLP>>
IECLP>>Mode
t
E CLP >>
BF Enable (ON≡Enable)
IE>>BF
towards BF logic
IE>> BF
&
Trip IE>>
TRIPPING MATRIX (LED+RELAYS)
A
B
C
Output t
ECLP>>
IE>> Enable
IE>> residual overcurrent element (50N/51N) Block diagram
t
ECLP>>
CB State CB OPEN CB CLOSED CB OPEN
Output t
ECLP
>
>
t
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
HIGH THRESHOLD/
BLOCK
A = ON - Change setting
B = OFF
C = ON - Element blocking
&
(ON≡
Inhibit )
Start IE>>
Start IE>>
IE> inhibition
IE> disbylE>>
≥1
CLP IE>>
ON≡Inhibit
(from IE>>> residual overcurrent element)
ON≡Enable IE>> residual overcurrent element
I
E>>def
A =“1”A =“0 or OFF”
I
E
(Pickup within CLP)
(Pickup outside CLP)
I
E CLP >>def
I
E
≥ I
ECLP
>>
def
&
State
I
E
≥ I
E
>>
def
Residual overcurrent (50N/51N) - Second element logic diagram (IE>>)