U.4.26
SEL-421 Relay User’s Guide Date Code 20090715
Basic Relay Operations
Making Simple Settings Changes
e. Type <Ctrl+T> to open the ACSELERATOR QuickSet
terminal window.
f. Type <Enter> to see whether the communications link
is active between
ACSELERATOR QuickSet and the
relay.
You will see the Access Level 0 = prompt in the
terminal window.
g. Exit the terminal window.
Step 2. Confirm the correct
ACSELERATOR QuickSet passwords.
a. Reopen the Communication menu and click Port
Parameters.
b. Enter your Access Level 1 password in the Level One
Password text box, and your Access Level 2 password
in the Level Two Password text box.
c. Click OK to accept changes and close the dialog box.
Step 3. On the Settings menu, click Read to read the present
configuration in the SEL-421.
The relay sends all configuration and settings data to
ACSELERATOR QuickSet.
Step 4. Select Global settings.
a. Click the plus mark (+) next to the Global branch of the
left-hand
ACSELERATOR QuickSet tree structure shown
in Figure 4.18.
b. Click Global Settings/Enables.
You will see the Global Settings/Enables window with
General Global Settings and Global Enables (see
Figure 4.19).
Step 5. Change settings.
a. Click the button for the correct option for NFREQ and
PHROT to specify your system frequency and phase
rotation.
When you tab or click to the next field, the relay
validates the new setting.
b. The right-click mouse button performs two special
functions when you are editing settings: Previous
Value and Default Value.
➢ Right-click in the setting dialog box and select
Previous Value if you want to revert to the setting value
before you made a change.
➢ Right-click in the setting dialog box and select Default
Value if you want to restore the factory default setting
value.
Courtesy of NationalSwitchgear.com
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