Schweitzer Engineering Laboratories SEL-311C - Event Summary

12.3
Date Code 20060320 Instruction Manual SEL-311C Relay
Standard Event Reports and SER
Standard 15/30/60/180-Cycle Event Reports
The elements is this example setting are:
Note the rising edge operator / in front of each of these elements. See
Appendix H: 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:
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 H.2
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. Additionally, the relay triggers a standard event report if
output contacts OUT101–OUT107 (Models 311C00x and 311C01x) 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: Serial Port Communications and Commands and Section 11:
Front-Panel Interface (Only on Models With LCD) (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:
➤ Relay and terminal identifiers (settings RID and TID)
➤ Date and time when the event was triggered
➤ Event type
➤ Fault location
M2P Zone 2 phase-distance element asserted.
Z2G Zone 2 ground-distance element asserted.
51G Residual ground current above pickup setting 51GP for
residual ground time-overcurrent element 51GT (see
Figure 3.25).
51Q Negative-sequence current above pickup setting 51QP for
negative-sequence time-overcurrent element 51QT (see
Figure 3.26).
50P1 Phase current above pickup setting 50P1P for phase
overcurrent element 50P1.
LOP Loss-of-potential (LOP) asserts.