D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 609
D90
Plus
Line Distance Protection System
Chapter 13: Security
Securi ty
This section outlines how to program the D90
Plus
security features.
Password security
It is recommended that passwords be programmed for each security level and assigned to
specific personnel. There are two password security access levels: command and setting.
The command access level restricts the user from making any settings changes, but allows
the user to perform the following operations:
• Operate breakers via the front panel interface
• Change the state of virtual inputs
• Clear event records
• Clear oscillography records
•Clear fault reports
• Change the system date and time
•Clear energy records
• Operate control pushbuttons
The setting access level allows the user to make any changes to any of the setting values
and operate in test mode.
The command and setting passwords are not programmed when the device is shipped
from the factory. When a command or setting password is set to null/not programmed, the
password security feature is disabled.
The D90
Plus
supports password entry from a local or remote connection. This means that
four password types are possible: a local command password, remote command
password, local settings password, and remote settings password.
Local access is access to settings or commands via the faceplate interface. This includes
both keypad entry and the faceplate serial USB connection. Remote access is access to
settings or commands via any rear Ethernet port. Any changes to local or remote
passwords enables this functionality.
The rear RS485 port can be configured as either a local or remote connection through the
serial port
Connection setting.
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