Schweitzer Engineering Laboratories SEL-311L, Instruction Manual, Page: 507 / 734

Date Code 20010625 Standard Event Reports and SER 12-3
SEL-311L Instruction Manual
Note the rising edge operator / in front of each of these elements. See Appendix G: Setting
SEL
OGIC
Control Equations 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 and
then generating another later if for example a breaker failure condition occurs. If at the inception
of a ground fault, pickup indicator 51G asserts and an event report is generated, include /51G in
the ER setting:
ER = ... + /51G + ... = logical 1 (for one processing interval)
Even though the 51G pickup indicator remains asserted for the duration of the ground fault, the
rising edge operator / in front of 51G (/51G) causes setting ER to be asserted for only one
processing interval. Other operators in the setting ER SEL
OGIC
control equation can trigger
event reports while 51G is still asserted.
Falling edge operators \ are also 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 TRI serial port command is to generate standard event reports, primarily
for testing purposes.
The PUL command asserts the output contacts for testing purposes or for remote control. If
output contacts OUT101–OUT107 or OUT201–OUT206 assert via the PUL command, the relay
triggers a standard event report. The PUL command is available at the serial port and the relay
front-panel CNTRL pushbutton.
See Section 10: Line Current Differential Communications and Serial Port Communications
and Commands and Section 11: Front-Panel Interface (Figure 11.3) for more information on
the TRI (Trigger Event Report) and PUL (Pulse Output Contact) commands.
Event Summary
Each time the relay generates a standard event report, it also generates a corresponding event
summary (see Figure 12.1). Event summaries contain the following information:
v
Relay and terminal identifiers (settings RID and TID)
v
Date and time when the event was triggered
v
Event type
v
Fault location
v
Breaker Trip Time
v
Recloser shot count at the trigger time
v
System frequency at trigger time
v
Active Settings Group
v
Breaker Close Time