FUNCTION CHARACTERISTICS
159
NVA100X-D - Manual - 02 - 2016
Residual overcurrent (50N.1/51N.1) - Second element logic diagram (IE1>>) (Sheet 1 of 2)
Fun_50N-51NS2.ai
t
E 1 >>RES
T
0
R E S E T
t
E 1 >>
0
T
≥
1
t
E 1 >>def
t
E 1 >>RES
Start IE1>>
Trip IE1>
>
CB-State
Start
I
2ndh>
IE1
>
> inhibition
Block1, Block2, Block4
&
IE1>
>
TR-K
IE1>
>
TR-L
IE1>
>
ST-L
IE1>
>
ST-K
T
0
t
E CLP>>
&
2nd harmonic restraint enable (ON
≡
Enable)
IE1>>2ndh-REST
IE1CLP>>Mode
t
E 1 C L P >>
BF Enable (ON
≡
Enable)
IE1>>BF
towards BF logic
IE1>> BF
&
Trip IE1>>
TRIP
P
ING
M
ATRIX
(LED
+R
EL
AY
S
)
A
B
C
Output
t
E CLP>>
IE1
>>
Enable
IE1>> overcurrent element (50N.1/51N.1) Block diagram
t
E 1 CLP>>
CB State
CB OPEN
CB CLOSED
CB OPEN
Output t
E1CLP
>
>
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 IE1>>
Start IE1>>
IE1> inhibition
IE1> disbylE>>
≥
1
CLP IE1>>
ON
≡
Inhibit
(from IE1>>> residual overcurrent element)
ON
≡
Enable IE1>> residual overcurrent element
I
E 1 >>def
A =“1”
A =“0 or OFF”
I
E 1
(Pickup within CLP)
(Pickup outside CLP)
I
E1C L P >>def
I
E 1
≥
I
E 1 C L P
> > d e f
&
State
I
E1
≥
I
E1
>>
def