Thytronic NA011 - Page 38

FUNCTION CHARACTERISTICS
38
NA011 - Manual - 05 - 2022
Residual overcurrent (50N/51N) - Second element logic diagram (IE>>)
Fun_50N-51NS2.ai
t >>
RES
T0
RESET
t
E>>
0T
t
E
>>
def
t
E
>>
inv
t
E>>RES
Start IE>>
Trip IE>>
CB-State
T 0
t
ECLP
>>
IECLP >> Mode
t
E CLP
>>
BF Enable (ON≡ Enable)
IE>>BF
towards BF logic
IE>> BF
&
Trip IE>>
TRIPPING MATRIX (LED+RELAYS)
I
E
>> Curve
0T
A
B
C
A =“1”A =“0 or OFF”
Output
t
ECLP
>>
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
I
E
>>TR-K
I
E
>>TR-L
I
E
>>ST-L
I
E
>>ST-K
I
E
≥ 1
(Pickup within CLP)
(Pickup outside CLP)
I
E CLP >def
I
E CLP >inv
I
E
≥ I
ECLP
>
I
E
>>
inv
I
E
≥ I
E
>>
def
I
E
≥ I
E
>
inv
I
E
>>
def