Thytronic NA11, Manual

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55 NA11 - Manual - 02 - 2009 FUNCTION CHARACTERISTICS
Fun_50-51S2.ai
t
>>RES
T 0
R E S E T
t
>>
0 T
≥
1
t
>>def
t
>>inv
t
>>RES
Start I>>
Trip I> >
CB-State
Start I
2ndh>
ON
≡
Inhibit (from I>>> overcurrent element)
ON
≡
Enable I>> overcurrent element
I > > inhibition
Block1, Block2
I> > TR-K
I> > TR-L
I> > ST-L
I> > ST-K
T 0
t
CLP>>
&
&
2nd harmonic restraint enable (ON
≡
Enable)
I>>2ndh-REST
ICLP>>Mode
t
C L P >>
BF Enable (ON
≡
Enable)
I>>BF
towards BF logic
I>> BF &
Trip I>>
TRIP
P
ING
M
A
TRIX
(LED
+R
EL
A
Y
S
)
I >> Curve
0 T
A
B
C
Output
t
CLP>>
I >> Enable
I>> overcurrent element (50/51) Block diagram
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
&
(ON
≡
Inhibit)
Start I>>
I> inhibition
I> disbyl>>
≥
1
CLP I>>
Phase overcurrent (50/51) - Second element logic diagram (I>>)
I
L 1
I
L 2
≥
1
≥
1
(Pickup within CLP)
(Pickup outside CLP)
I
C L P >>def
I
C L P >>inv
I
L 1
≥ I > >
A =“1” A =“0 or OFF”
I
L 3
&
State
I >>
inv
I
L 1
≥ I >>
def
I
L 1
≥ I >>
inv
I >>
def
&
State