Schweitzer Engineering SEL-387-0, Instruction Manual

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9.3
Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Event Reports and SER
Standard 15-, 30-, or 60-Cycle Event Reports
ER is factory-set with definite-time and inverse-time overcurrent element
pickups for phase- and negative-sequence quantities on Windings 1, 2, and 3.
Thus, at the inception of a fault, whichever pickup asserts first will trigger a
standard 15-, 30-, or 60-cycle event report.
Note the rising-edge operator symbol (/) in front of each of these elements.
See
Section 4: Control Logic for more information on rising-edge operators
and SEL
OGIC
control equations in general.
Rising-edge operators are especially useful in generating an event report at
fault inception, then generating another event report later if a breaker trips on
some time-delayed element.
PULSE and TRIGGER Commands
The PULSE serial port/front-panel command is used to assert the output
contacts for testing purposes or for remote control. If an output contact
OUT101 – OUT107 or an available interface board contact OUT nnn is asserted with
the PULSE command, a standard 15-, 30-, or 60-cycle event report is also
generated. Since the PUL command generates an event report, precautions
should be taken to retrieve and store any existing event reports of interest that
presently may be in the relay before testing the output contacts with the
PUL
command. Failure to do so may result in some or all of the existing reports
being overwritten when
PUL commands are issued.
The sole function of the TRIGGER serial port command is to generate
standard 15-, 30-, or 60-cycle event reports primarily for testing purposes.
Simply type
TRI <Enter> to execute the command.
See Section 7: Serial Port Communications and Commands for more
information on serial port commands TRIGGER and PULSE .
Standard Event
Report Summary
Each time the relay generates a standard 15-, 30-, or 60-cycle event report, it
also generates a corresponding event summary (see
Figure 9.1 ). Use the
EVE T command to generate this summary. Event summaries contain the
following information:
➤
Relay and terminal identifiers (settings RID and TID)
➤
Date and time when the event was triggered
➤
Event type
➤
Front-panel targets at the time of trip
➤
Phase (IA, IB, IC) currents for the four (4) winding inputs
This event summary information is also contained in the corresponding
standard 15-, 30-, or 60-cycle event report. The identifiers, date, and time
information is at the top of the standard 15-, 30-, or 60-cycle event report, and
the other information follows at the end. See
Figure 9.2 .
The example event summary in Figure 9.1 corresponds to the full-length
standard 15-cycle event report in Figure 9.2 .
NOTE:
The relay sends event
summaries to all serial ports with
setting AUTO = Y each time an event
triggers.