U.3.9
Date Code 20020501
User’s Guide
SEL-421/SEL-421-1 Relay
PC Software
Create and Manage Relay Settings
Create and Manage Relay Settings
The
AC
SEL
ERATOR
software gives you the ability to create settings for one or
more SEL-421 Relays. You can store existing relay settings downloaded from
SEL-421 Relays with the
AC
SEL
ERATOR
software, creating a library of relay
settings (see
). You can then modify and
upload these settings from your settings library to an SEL-421 Relay.
The
AC
SEL
ERATOR
software makes setting the relay easy and efficient. For an
example of setting the SEL-421 Relay with the
AC
SEL
ERATOR
software, see
Making Initial Global Settings:
Software on page U.4.25 in the
Collected Settings
The
AC
SEL
ERATOR
software arranges relay settings in easy-to-understand
categories (for an explanation of settings organization, see
Settings Changes on page U.4.15 in the User’s Guide
). These categories of
collected settings help you quickly set the relay.
is an example of
relay settings categories in the Relay Editor Settings tree view. (Use the
procedures described in Settings Menu to view the tree views in
The
AC
SEL
ERATOR
software shows all of the settings categories in the
settings tree view. When you enable and disable settings categories, the tree
view remains constant, but when you click on the tree view to access the
settings in a disabled category, the disabled settings are dimmed. For example,
select the Group 1 > Set 1 > Relay Configuration branch of the Settings tree
view and choose N for E50Q. Click on the Negative-Sequence O/C branch
and observe that the Negative-Sequence Overcurrent Elements settings are
dim. If you select 1 for E50Q, then only the level 1 overcurrent element
settings are active and the remainder of the Negative-Sequence Overcurrent
Element settings are dim.
illustrates this feature of the
AC
SEL
ERATOR
software.
Figure 3.10
Sample Settings in the
AC
SEL
ERATOR
Software.
Settings Menu
The Settings menu on the top
AC
SEL
ERATOR
toolbar is the starting point for
all settings entries. The menu items in the Settings menu are New, Open, and
Read. All of these menu items open the Relay Editor (see
Summary of Contents for SEL-421
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