Post on 20-Aug-2018
X67
50/2746BC67N/
32N CTS 37
27/59 81 VTS/
CVTS50BF 79 25
Fault records Disturbance Record
Measurements
PSL
Local Communication
2nd Remote comm. port
Remote comm. port
Distance Relay P441, P442 & P444
Inter MiCOM
LEDs
conventional signalling
always availableoptional
protectioncommunication
Vref
V
I
Self monitoring
85
21P 21G 50/51
FL
50N/51N 51FF 67/
46 68
50ST
Neutral currentfrom parallel line(if present)
IM
49 SOTF/TOR
(i) Faulted
(ii) Unfaulted(predicted)
ZS
(iii) Superimposed
FI f
Vf
V t=0
I
I
F
F
Vp VP
p
I fVf
V
Voltage Current
t=0 t=0
Vp I
I
p
U0
I0
IMAX
I2
U2
U<
I
&
&
1 or 2 VT signalsfailed
3 VT signals failed
Threshold V0>
CVTS Alarm100 s
UAB>
&
>1