U.6.24
SEL-421 Relay
User’s Guide
Date Code 20090715
Testing and Troubleshooting
Checking Relay Operation
Step 9. Select the HMI menu (top toolbar) and then click
Meter and
Control
to start the
AC
SEL
ERATOR
QuickSet HMI interface.
Step 10. View the SER report.
Step 11. Click the
SER
button of the HMI tree view (see
AC
SEL
ERATOR
QuickSet displays the
SER
report similar to
The time difference between SER entries
51S1 PICKED UP
and
51S1 TIMOUT
is approximately 3.2 seconds.
Figure 6.16
HMI Tree View:
AC
SEL
ERATOR
QuickSet
Figure 6.17
SER Report:
AC
SEL
ERATOR
QuickSet
HMI
Checking Relay Operation
The SEL-421 comes to you with all functions fully checked and calibrated so
that the relay operates correctly and accurately. You can perform tests on the
relay to verify proper relay operation, but you do not need to test every relay
element, timer, and function in this evaluation. The following checks are
valuable for confirming proper SEL-421 connections and operation:
➤
AC connection check (metering)
➤
Commissioning tests
➤
Functional tests
➤
Element verification
Summary of Contents for 421
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