12.4
SEL-351A Relay Instruction Manual Date Code 20080213
Standard Event Reports and SER
Standard 15/30-Cycle Event Reports
Standard Event
Report 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
➤ 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
) current
magnitudes in amps primary measured at the largest phase
current magnitude in the triggered event report
The Event Report Summary shows the magnitude of the maximum phase
current calculated by the cosine filter or bipolar peak detector. When the relay
uses the bipolar peak detector value, the relay displays
pk as shown in the
Event Summary portion of the Example Standard 15-Cycle Event Report near
the end of this section (for more information on the cosine filter and bipolar
peak detector, see CT Saturation Protection on page 1.4).
The relay includes the event summary in the standard event report. The
identifiers, date, and time information is at the top of the standard event report,
and the other information follows at the end. See Figure 12.3.
The example event summary in Figure 12.1 corresponds to the full-length
standard 15-cycle event report in Figure 12.3.
FEEDER 1 Date: 07/12/99 Time: 09:28:31.721
STATION A
Event: AG T Location: 2.36 Shot: 0 Frequency: 60.01
Targets: INST 50
Currents (A Pri), ABCNGQ: 2752 pk 209 209 1 2689 2689
Figure 12.1 Example Event Summary
The relay sends event summaries to all serial ports with setting AUTO = Y
each time an event triggers.
The latest event summaries are stored in nonvolatile memory and are accessed
by the HIS (Event Summaries/History) command.
Event Type
The Event field shows the event type. The possible event types and their
descriptions are shown in Table 12.1. Note the correspondence to the
preceding event report triggering conditions (see Standard Event Report
Triggering on page 12.2).
NOTE: Figure 12.3 is on multiple
pages.
Courtesy of NationalSwitchgear.com
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