P.10.7
Date Code 20151029 Protection Manual SEL-411L Relay
Basic Relay Operations
Changing the Default Passwords
The relay performs command interpretation and execution according to your
validated access level. Each access level has a password that the relay must
verify before you can control the relay at that level. Table 10.3 lists the access
level commands with corresponding passwords.
Communications Ports Access Levels
Entrance to the higher security levels is sequential. You must first enter a
correct password to move from Access Level 0 to Access Level 1.
To enter Access Levels B, P, A, O, and 2, you must enter a correct password
from Access Level 1. For example, to go to the O (Output) Access Level from
Access Level 1, type OAC <Enter>. At the
Password: ? prompt, type your
Access Level O password.
To enter Access Level C, you must enter a correct password from Access Level 2.
Use the relay QUIT command from any access level to return the relay to
Access Level 0. To reestablish control at a previous access level from Access
Level 1, you must use the access level commands and passwords to log in to
that previous access level.
When a connection with the relay times out, the relay reduces the access level
to Access Level 0 for that communications port connection.
The MAXACC port setting can be used to limit the maximum access level
permitted on a port. This can be useful to restrict what remote users can do.
Front-Panel Access Levels
The lowest access level for the front panel is Access Level 1. To enter Access
Levels B, P, A, O, and 2, you must enter a correct password from Access
Level 1.
The front-panel LCD displays a password prompt when you attempt to control
the relay at any access level higher than Access Level 1. (For more
information on entering passwords from the front panel, see Password on
page P.7.13.)
The front-panel
MAIN MENU item RESET ACCESS LEVEL returns the relay to
Access Level 1. In addition, when the front-panel inactivity timer times out
(indicated by the
ROTATING DISPLAY on the front-panel LCD), the relay
returns the front-panel access level to Access Level 1.
Table 10.3 Access Levels Commands and Passwords
Access Level Prompt Allowed Operations Command
Facto ry De fa u lt
Password
0 = Log in to Access Level 1; some test diagnostics. QUIT (None)
1 => View data and status information. ACCESS OTTER
B ==> Access Level 1 functions plus breaker control and data. BACCESS EDITH
P P=> Access Level B functions plus protection settings. PACCESS AMPERE
A A=> Access Level B functions plus automation settings. AACCESS VOLTA
O O=> Access Level B functions plus output settings. OACCESS WATT
2 =>> Perform all relay access level functions. 2ACCESS TAIL
C ==>> SEL calibration-specific functions. For a list of
commands available, contact SEL.
CAL Sel-1
This device is shipped with default
passwords. Default passwords
should be changed to private
passwords at installation. Failure to
change each default password to a
private password may allow
unauthorized access. SEL shall not
be responsible for any damage
resulting from unauthorized access.
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