P.8.21
Date Code 20151029 Protection Manual SEL-411L Relay
Oscillography, Events, and SER
Event Reports, Event Summaries, and Event Histories
Figure 8.10 Sample Digital Portion of the Event Report
EXAMPLE 8.4 Reading the Digital Portion of the Event Report
This example shows how to read the digital event report shown in
Figure 8.9. The sample digital event report shows seven cycles of
4-samples/cycle data for a BCG fault that trips a single-pole-capable
circuit breaker.
In this particular report, the mho phase distance elements Z1P and
Z2P pick up in the first sample of Cycle [7]. The relay asserts the
tripping Relay Word bits TPA, TPB, and TPC when the distance
elements operate because of programming in the TR (Unconditional
Tripping) SEL
OGIC control equation.
In the next reported sample (the second sample of Cycle [7]), the
digital event report shows that the relay has asserted the negative-
sequence directional element, 32QF, and the ground directional
element, 32GF.
Approximately three cycles later, the digital event report shows that
the circuit breaker has tripped. In Cycle [10], Relay Word bit SPO
indicates that the relay has detected a single-pole open; one of the
poles of the circuit breaker has opened. The remaining poles open
and the relay asserts Relay Word bit, 3PO, (Three-Pole Open). Note
that the relay polarizing voltage for element security, VPOLV, is
always available.
Selecting Event Digital Elements
Specify the digital elements in the digital section of the event report by using
the Event Reporting Digital Elements settings found in the Report settings
(the SET R command from a terminal or the Report branch of the Settings
tree view of
ACSELERATOR QuickSet). You can enter as many as 800 Relay
Word bits from a maximum of 100 target rows. The # symbol places a blank
column in the digital report. Use the # symbol to organize the digital section of
the event report.
ERAQc (Analog Quantities)
To supplement the fixed analog quantities in the event report, select here up to
20 additional analog quantities in the event report. For example, say you
programmed a function in the relay using Protection Math Variables
PMV01–PMV06, and you want to include these six PMVs in the event report.
Enter the six PMVs in the Event Reporting Analog Quantities as shown below.
00H
I R UUA
N M L TTL
2 BM0 22A
0 A2K 00R
1 5PA 34M
. ... ...
.. ...
* ..* ...
* ..* ...
IN201
#
RMBA5
Z2P
LBOKA
#
OUT203
OUT204
HALARM
NOTE: The compressed event
reports and COMTRADE files from
the relay may contain additional
digital elements as compared to
standard (ASCII) event reports (see
CEVENT).
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