7.37
Date Code 20081022 Instruction Manual SEL-787 Relay
Communications
SEL ASCII Protocol and Commands
TFE Command (Through-Fault Event Report)
The TFE command displays the following data for each individually recorded
through-fault event:
➤ Date and time of the through fault
➤ Duration (seconds) of the through fault
➤ Maximum current (Amps primary) for each monitored current
input
The following cumulative values (updated for each new through-fault event)
are also displayed:
➤ Through-fault count
➤ Total accumulated percentage of through-fault capability used
up per phase
There are various choices for the TFE command, listed briefly below. Refer to
Section 5: Metering and Monitoring for a complete description of the
through-fault event reports:
TIME Command (View/Change Time)
The TIME command (see Table 7.52) returns information about the SEL-787
internal clock. You can also set the clock if you specify hours and minutes
(seconds data are optional). Separate the hours, minutes, and seconds with
colons, semicolons, spaces, commas, or slashes.
Use the TIME hh:mm and TIME hh:mm:ss commands to set the internal
clock time. The value hh is for hours from 0–23; the value mm is for minutes
from 0–59; the value ss is for seconds from 0–59. If you enter a valid time, the
relay updates and saves the time in the nonvolatile clock, and displays the time
you just entered. If you enter an invalid time, the SEL-787 responds with
Invalid Time.
TFE Displays cumulative and individual through-fault event data. The 20 most
recent individual events are displayed.
TFE A Displays cumulative and individual through-fault event data. All of the
most recent individual events are displayed, up to 500.
TFE C Clears/resets cumulative and individual through-fault event data.
TFE n Displays cumulative and individual through-fault event data. The n most
recent individual events are displayed, where n = 1 to 500.
TFE P Preloads cumulative through-fault event data.
TFE R Clears/resets cumulative and individual through-fault event data.
Table 7.52 TIME Command (View/Change Time)
Command Description Access Level
TIME Display the present internal clock time. 1
TIME hh:mm Set the internal clock to hh:mm.1
TIME hh:mm:ss Set the internal clock to hh:mm:ss.1
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