Thytronic NC020 - Page 41

FUNCTION CHARACTERISTICS
41
NC020 - Manual - 05 - 2022
Fun_50-51-S3.ai
I
L1
I
L2
I
L3
t
I
>>>
RES
T0
RESET
t
I
>>>
0T
≥1
t
I
>>>
def
t
I
>>>
RES
Start I>>
Trip I>>>
CB-State
ON≡Enable I>>> overcurrent element
(Pickup within CLP)
(Pickup outside CLP)
&
T 0
t
CLP>>>
ICLP>>>Mode
I
CLP >>>def
t
CLP >>>
ON≡Enable
BF Enable
towards BF logic
I>>> BF
&
Trip I>>>
TRIPPING MATRIX (LED+RELAYS)
A
B
C
A =“1”A =“0 or OFF”
Output
t
CLP>>>
I>>> Enable
t
CLP>>>
CB State
CB OPEN CB CLOSED CB OPEN
Output t
CLP
>>>
t
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
HIGH THRESHOLD/
BLOCK
A = ON - Change setting
B = OFF
C = ON - Element blocking
I>>>TR-K
LED 1
I>>>ST-L
I>>>ST-K
I
L1
≥ I>>>
def
I
L1
≥ I
CLP
>>
)
I>>>
def
Fundamental phase overcurrent (50/51) - I>>> element logic diagram