Thytronic XMR-V 4V - Page 174

174
FUNCTION CHARACTERISTICS
I2-I1S1.ai
(I2/I1)
RESET
t
2 >
0T
≥1
t
21>def
Start I21>
Trip I21>
CB-State
Start I
2ndh>
ON≡Enable (I2/I1)> element
(Pickup within CLP)
(Pickup outside CLP)
Block1
&
T 0
t
21CLP>
&
2nd harmonic restraint enable (ON≡Enable)
I21>2ndh-REST
I21>CLP>Mode
t
21CLP >
TRIPPING MATRIX (LED+RELAYS)
A
B
C
A =“1”A =“0 or OFF”
Output
t
21CLP>
State
t
21CLP>
CB State
CB OPEN CB CLOSED CB OPEN
Output t
21CLP>
t
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
HIGH THRESHOLD/
BLOCK
A = ON - Change setting
B = OFF
C = ON - Element blocking
I21>TR-K
I21>TR-L
I21>ST-K
I21>ST-L
≥1
CLP I21>
(I2/I1) ≥ I21>
def
I21>
def
(I2/I1) ≥ I21
CLP
>
def
I21>
def
Negative sequence-positive sequence ratio element (I2/I1) - Logic diagram
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021