7.12
SEL-421 Relay Instruction Manual Date Code 20171021
Metering, Monitoring, and Reporting
Reporting
Event Summary Section of the Event Report
The third portion of an event report is the summary section. See Figure 7.5 for
the locations of items included in a sample summary section of an event report. If
you want to exclude the summary portion from an event report, use the EVE
NSUM command (see EVENT on page 14.23 in the SEL-400 Series Relays
Instruction Manual).
The information in the summary portion of the event report is the same informa-
tion in the event summary, except that the report header does not appear immedi-
ately before the event information when you view a summary in the event report.
See Event Summary on page 7.13 for a description of the items in the summary
portion of the event report.
Figure 7.4 Sample Digital Portion of the Event Report
Example 7.1 Reading the Digital Portion of the Event Report
This example shows how to read the digital event report shown in Figure 7.3.
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 pro-
gramming 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 direc-
tional element, 32QF, and the ground directional element, 32GF.
Approximately three cycles later, the digital event report shows that the cir-
cuit 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.
00H
I R UUA
N M L TTL
1 BM0 22A
0 A2K 00R
1 5PA 34M
. ... ...
.. ...
* ..* ...
* ..* ...
IN101
#
RMBA5
Z2P
LOKA
#
OUT203
OUT204
HALARM
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