10.6
SEL-400 Series Relays Instruction Manual Date Code 20171006
Testing, Troubleshooting, and Maintenance
Testing Features and Tools
Event Reports
NOTE: Control Inputs are sampled at
2 kHz, and then conditioned by a
debounce timer. The resulting Relay
Word bits are updated 8 times/cycle
and are available in standard event
report files.
The relay also generates a filtered-quantities event report in response to faults or
disturbances. Each event report contains information on current and voltage,
relay element states, control inputs, and control outputs. If you are unsure of the
relay response or your test method, the event report provides you with informa-
tion on the operating quantities that the relay used at the event trigger. The relay
provides oscillographic displays of the filtered event report data, which give you
a visual tool for testing relay operating quantities. You can use the serial ports
and QuickSet to view event reports. See Event Reports, Event Summaries, and
Event Histories on page 9.13 for a complete discussion of event reports.
Event Summary Reports
The relay generates an event summary for each event report; use these event sum-
maries to quickly verify proper relay operation. With event summaries, you can
quickly compare the reported fault current and voltage magnitudes and angles
against the reported fault location and fault type. If you question the relay
response or your test method, you can obtain the full event report and the high-
resolution oscillographic report for a more detailed analysis. See Event Summary
on page 9.26 for more information on the event summary.
SER Reports
The relay provides an SER report that time tags changes in relay elements, con-
trol inputs, and control outputs. Use the SER for convenient verification of the
pickup and dropout of any relay element. For a complete discussion of the SER,
see Sequential Events Recorder (SER) on page 9.28.
Test Commands
TAR Command
Use the TAR command to view the state of relay control inputs, relay outputs,
and relay elements individually during a test. You can see relay targets at the
serial ports, and from the front-panel LCD (see TARGET on page 14.53 and
Operation and Target LEDs on page 4.33).
PUL Command
Use the PUL command to test the control output circuits. The specified output
closes if open, or opens if closed. You can use the PUL command at the serial
ports, in the QuickSet HMI, and from the front-panel LCD (see PULSE on
page 14.45, QuickSet HMI on page 2.19, and Operation and Target LEDs on
page 4.33).
TEST DB Command
Use the TEST DB command for testing the relay database, which is used for Fast
Message Data Access. The TEST DB command can be used to override any
value in the relay database. Use the MAP 1 command and the VIEW 1 command
to inspect the relay database (see MAP on page 14.37). You must be familiar with
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