3.7
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Basic Relay Operations
Access Levels and Passwords
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Access Levels and Passwords
NOTE: Perform the password change
steps described in
Changing the
Default Passwords in the Terminal on
page 3.10
.
It is extremely important that you change the factory-default passwords pro-
grammed in the relay. Setting unique passwords for the relay access levels
increases the security of your substation and the power system.
This subsection begins with information on the access level/password system in
SEL-400 relays and includes an example of changing the default passwords.
Access Levels
Access levels control whether you can perform different operations within the
relay. These security levels are labeled 0, 1, B, P, A, O, 2, and C. Figure 3.6 pres-
ents an overview of the general access level structure in the relay.
Figure 3.5 Example HTTP Server Meter Page
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