Schweitzer Engineering Laboratories SEL-311C - Page 466

13.12
SEL-311C Relay Instruction Manual Date Code 20060320
Testing and Troubleshooting
Relay Testing
Purpose: Use the front-panel setting feature to adjust a relay setting.
Method: The following actions are required to change a relay setting from the
SEL-311C front panel:
➤ Enter Access Level 2 by using the appropriate password.
➤ Execute the SET command.
➤ Select the setting to change.
➤ Make and accept the setting change.
Step 1. Press the front-panel pushbutton labeled {SET}.
Step 2. Using the arrow keys, move the cursor to the menu item
PASS.
Step 3. Press the pushbutton labeled {SELECT}.
Step 4. Using the arrow keys, move the cursor to the menu item
2AC.
Step 5. Press the pushbutton labeled {SELECT}.
This instructs the relay to execute the 2ACCESS command.
Step 6. To enter Access Level 2, you must enter the correct password.
a. Refer to Section 10: Serial Port Communications and
Commands for a discussion about passwords. The relay
displays a list of characters from which you can build
the password.
b. Use the Up or Down arrow button to select the first
letter.
c. Use the arrow buttons to select the remaining letters.
The blank character precedes the second letter of the
password.
d. When the lower line of the display reads the following
(where “XYZ” represents the current password):
PASSWORD: XYZ
press the {SELECT} button to enter Access Level 2.
The relay then resumes the default display.
e. Press the pushbutton labeled {SET}.
f. The display shows:
GROUP GLOBAL
PORT PASS
g. Press {SELECT}.
h. Use the Down arrow pushbutton to enter the number 1,
then press {SELECT} again.
i. Use the Left arrow pushbutton to select the menu item
SET, then press {SELECT} again.
j. Press the Down arrow pushbutton repeatedly, until the
upper line of the display reads:
LL = 100.00
NOTE: The SEL-311C includes six
setting groups. While you are testing
this relay, it is important to change
settings in the group that is active. If
you change settings in an inactive
setting group, the relay performance
will not change. The relay is shipped
with Setting Group 1 active. You can
change the active group by executing
the GROUP command from the relay
front panel or from a terminal
connected to a relay serial port. You
must enter the Breaker Access Level
or Access Level 2 to change the active
group.