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Date Code 990215 Standard Event Reports and SER 12-3
SEL-351P Manual Técnico
Rising edge operators are especially useful in generating an event report at fault inception and
then generating another later if a breaker failure condition occurs. For example, at the inception
of a ground fault, 51G1 picks up, generating an event report:
ER = ... + /51G1 + ... = logical 1 (for one processing interval)
Even though the 51G1 pickup indicator remains asserted for the duration of the ground fault, the
rising edge operator, “/”, in front of 51G1 (/51G1) causes setting ER to assert for only one
processing interval.
Falling edge operators, “\”, also may be used to generate event reports. See Figure G.2 in
Appendix G: Setting SEL
OGIC
®
Control Equations for more information on falling edge
operators.
TRI (Trigger Event Report) and PUL (Pulse Output Contact) Commands
The sole function of the serial port Trigger command, TRI, is to generate standard event reports,
primarily for testing purposes.
The Pulse Output command, PUL, asserts the output contacts for testing purposes or for remote
control. If output contact OUT101 through OUT107 asserts via the PUL command, the control
automatically triggers a standard event report. The PUL command is available through serial
port communication and the relay front-panel CNTRL pushbutton.
See Section 10: Serial Port Communications and Commands and the Pushbutton Primary
Functions subsection (CNTRL pushbutton) in the Front-Panel Interface section of the
SEL-351P Quick-Start Installation and User’s Guide for more information on the TRI and PUL
commands.
Standard Event Report Summary
Each time the control generates a standard event report, it also generates a corresponding event
summary (see Figure SECTION 12: .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
•
Fault location
•
Recloser shot count at the trigger time
•
System frequency at the front of the event report
•
Front-panel fault type targets at the time of trip
•
Phase ( IA, IB, IC), neutral ground (IN), calculated residual ground (I
G
= 3I
0
), and
negative-sequence (3I
2
) currents
The control includes the event summary in the standard event report. The identifiers, date, and
time information are at the top of the standard event report, and the other information follows.
See Figure SECTION 12: .2.