Date Code 20111215 Reference Manual SEL-421 Relay
Section 10
R.Reference Manual
Settings
This section contains tables of relay settings for the SEL-421 Relay.
NOTE: When using the SET command
to configure your SEL-421, enter the
settings classes Global, Breaker
Monitor, and Group in the order
shown.
The relay hides some settings based upon other settings. If you set an enable
setting to OFF, for example, the relay hides all settings associated with that
enable setting. This section does not explain rules for hiding settings; these
rules are discussed in the applications sections of the instruction manual
where appropriate.
The settings prompts in this section are similar to the ASCII terminal and
ACSELERATOR QuickSet
®
SEL-5030 software prompts. The prompts in this
section are unabbreviated and show all possible setting options.
For information on using settings in protection and automation, see the
examples in the Applications Handbook. The section arranges settings in the
following order:
➤ Alias Settings on page R.10.3
➤ Global Settings on page R.10.4
➢ General global settings
➢ Global enables
➢ DC monitors
➢ Control inputs
➢ Settings group selection
➢ Data reset control
➢ Frequency estimation
➢ Time-error calculation
➢ Current and voltage source selection
➢ Synchronized phasor measurement
➤ Breaker Monitor Settings on page R.10.11
➢ Breaker configuration
➢ Inputs
➢ Contact wear
➢ Electrical operating time
➢ Mechanical operating time
➢ Pole scatter and pole discrepancy
➢ Current interrupted
➤ Group Settings on page R.10.14
➢ Line configuration
➢ Relay configuration
➢ Phase distance elements
➢ Series compensation
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