Thytronic XMR-T - Page 114

114
FUNCTION CHARACTERISTICS
Residual overcurrent (50N/51N) - Third element logic diagram (IE1>>>) Sheet 1 of 2
Fun_50N-51NS3.ai
t
E1>>>RES
T0
RESET
t
E1>>>def
0T
≥1
t
E1>>>def
t
E1>>>RES
Start IE1>>>
Trip IE1>>>
CB-State
Start I
2ndh>
ON≡Enable IE1>>> residual overcurrent element
Block1, Block2, Block4
&
IE1>>>TR-K
IE1>>>TR-L
IE1>>>ST-L
IE1>>>ST-K
T 0
t
ECLP>>>
&
2nd harmonic restraint enable (ON≡Enable)
IE1>>>2ndh-REST
IE1CLP>>>Mode
t
E1 CLP >>>
TRIPPING MATRIX (LED+RELAYS)
A
B
C
A = ON - Change setting
B = OFF
C = ON - Element blocking
Output
t
ECLP>>>
IE1>>> Enable
IE1>>> residual overcurrent element (50N.1/51N.1) Block diagram
t
E1CLP>>>
CB State CB OPEN CB CLOSED CB OPEN
Output t
E1CLP
>>
>
t
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
HIGH THRESHOLD/
BLOCK
&
(ON≡ Inhibit )
Start IE>>>
Start IE1>>>
Start IE1>>>
(ON≡
Inhibit )
IE1> inhibition
IE1>disbylE>>>
&
IE1>> inhibition
IE1>>disbylE>>>
≥1
CLP IE>>>
I
E1>>>def
A =“1”A =“0 or OFF”
I
E1
(Pickup within CLP)
(Pickup outside CLP)
I
E1 CLP >>>def
I
E1
≥ I
E1CLP
>>>def
&
State
I
E
≥ I
E
>>>
def
XMR-T EQUIPMENT MANUAL
Ed. 2.9 - 02/2021