Thytronic Pro-N NVA100X-D - Page 150

150
NVA100X-D - Manual - 02 - 2016
FUNCTION CHARACTERISTICS
F_51V-VC_S2.ai
I-I/U>> Trip
BF Enable (ON≡Enable)
BF Element
towards BF logic
I-I/U>> _OUT
&
&
(ON≡
Inhibit )
Start I/51V>>
I-51V> inhibition
I-I/U> disbyl-I/U>>
t
-I/U>>RES
t
-I/U>>def
I-I/U>> ST-K
I-I/U>> TR-K
I-I/U>> TR-L
I-I/U>> ST-L
U
12
U
23
≤ U
-I/U
<
U
23
I
L1L
I
L2L
U
31
I
L1L
> threshold
I
L2L
> threshold
U
-I/U
<
I
-I/U>>def
K
KI
-I/U
>>
I
-I/U
>>
&
&
&
t
I-51V>RES
T0
RESET
t
-I/U>>def
0T
I-I/U>> Start
I-I/U>> Trip
74VT Block
VT fault (74VT)
(=0 without fault)
TRIPPING MATRIX (LED+RELAYS)
U
31
≤ U
-I/U
<
U
12
≤ U
-I/U
<
≥1
Block1, Block2
I-I/U>> element (51V) Block diagram
I
L3L
I
L3L
> threshold
“U ≤ U
-I/U
<” “U > U
-I/U
<”
Voltage controlled overcurrent (51V) - Second element logic diagram