Thytronic NA30

FUNCTION CHARACTERISTICS
78
NA30 - Manual - 04 - 2022
Fun_50N-51NS3.ai
t
E>>>RES
T0
RESET
t
E>>>def
0T
≥1
t
E>>>def
t
E>>>RES
Start IE>>>
Trip IE>>>
CB-State
Start I
2ndh>
ON≡Enable IE>>> residual overcurrent element
Block1, Block2, Block4
&
IE>>>TR-K
IE>>>TR-L
IE>>>ST-L
IE>>>ST-K
T 0
t
ECLP>>>
&
2nd harmonic restraint enable (ON≡Enable)
IE>>>2ndh-REST
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
A = ON - Change setting
B = OFF
C = ON - Element blocking
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
&
(ON≡ Inhibit )
Start IE>>>
Start IE>>>
Start IE>>>
(ON≡
Inhibit )
IE> inhibition
IE>disbylE>>>
&
IE>> inhibition
IE>>disbylE>>>
≥1
CLP IE>>>
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) - Third element logic diagram (IE>>>)