Schweitzer Engineering Laboratories SEL-387E - Over-;Undervoltage Elements

Date Code 20080110 Analyzing Events 9-3
SEL-387E Instruction Manual
PULSE and TRIGGER Commands
The PUL serial port/front-panel command is used to assert the output contacts for testing
purposes or for remote control. If an output contact is asserted with the PUL command, a
standard 15-, 29-, or 60-cycle event report is also generated. Because 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 TRI serial port command is to generate standard 15-, 29-, or 60-cycle
event reports, primarily for testing purposes. Simply type TRI <Enter>, to execute the
command.
See Section 7: Communications for more information on the serial port commands TRI and
PUL.
Standard Event Report Summary
Each time the relay generates a standard 15-, 29-, or 60-cycle event report, it also generates a
corresponding event summary (see
Figure 9.1). 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 three (3) current winding inputs
• Phase (VA, VB, VC) voltage inputs
• Percent volts/hertz
This event summary information is also contained in the corresponding standard 15-, 29-, or 60-
cycle event report. The identifiers, date, and time information is at the top of the standard 15-,
29-, 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.
XFMR 1 Date: MM/DD/YY Time: HH:MM:SS.SSS
STATION A
Event: TRIG
Targets:
Winding 1 Currents (A Sec), ABC: 123.1 123.1 123.1
Winding 2 Currents (A Sec), ABC: 123.1 123.1 123.1
Winding 3 Currents (A Sec), ABC: 123.1 123.1 123.1
Winding X Voltages (V Sec), ABC: 123.1 123.1 123.1
Volts/Hertz Percent: 123.1
=>>
Figure 9.1: Example Event Summary