5-18 Metering and Monitoring Date Code 20080110
SEL-387E Instruction Manual
Relay response to the
TFE
command is:
=>TFE <Enter>
XFMR 1 Date: 06/17/06 Time: 18:59:49.130
STATION A
FID=SEL-387E-R700-V0-Z101003-D20060616
Number of Through Faults: 2 Last Reset: 02/10/04 19:56:22
Winding 1 Total I-squared-t (kA^2 seconds, primary):
A-phase B-phase C-phase
1.783 88.270 6.610
# Date Time Duration IA IB IC
(seconds) (A, primary max)
1 02/14/04 18:59:22.244 5.002 241 4158 260
2 02/11/04 11:37:55.495 30.834 220 241 451
In the above response, only two through-fault events have been recorded since the monitor was
last reset (most recent event listed first, labeled #1). Notice also that Winding 1 is the winding
whose current inputs are being monitored.
The
TFE
command just by itself (no parameters, as in the above example) can list as many as 20
through-fault events. To list all the stored through-fault events since the monitor was last reset,
execute the
TFE A
command. To list a particular number of through-fault events, execute the
TFE n
command (
n
= 1 to 1200; 1200 is the maximum number of through-fault events that can
be stored before overwriting begins).
To reset the cumulative through-fault count, reset cumulative I
2
t, and clear out the stored
through-fault events, execute the
TFE C
(clear) or
TFE R
(reset) command. The relay responds:
=>TFE R <Enter>
Clear Through Fault Event Buffer
Are you sure (Y/N) ? Y <Enter>
Clearing Complete
=>
Changing global setting ETHRU also has the same effect as executing the
TFE C
or
TFE R
command.
Preload the following cumulative through-fault count and I
2
t values:
• 10 through-fault counts
• 147.8 (kA)
2
seconds on A-phase
• 303.5 (kA)
2
seconds on B-phase
• 237.9 (kA)
2
seconds on C-phase
Execute the
TFE P
command to preload these values. The relay responds:
=>TFE P <Enter>
Number of Through Faults Preload = 2? 10 <Enter>
Winding 1 Total I-squared-t Preload (kA^2 seconds, primary):
A-phase = 1.783? 147.8 <Enter>
B-phase = 88.270? 303.5 <Enter>
C-phase = 6.610? 237.9 <Enter>
Are you sure (Y/N) ? Y <Enter>
To Next Page
Loading...
