2.6 Authorization
Four user categories have been predefined for the LHMI and the WHMI, each with
different rights and default passwords.
The default passwords in the protection relay delivered from the factory can be
changed with Administrator user rights.
User authorization is disabled by default for LHMI but WHMI always
uses authorization.
Table 6: Predefined user categories
Username User rights
VIEWER Read only access
OPERATOR •
Selecting remote or local state with (only locally)
• Changing setting groups
• Controlling
• Clearing indications
ENGINEER
• Changing settings
• Clearing event list
• Clearing disturbance records
• Changing system settings such as IP address, serial baud rate or
disturbance recorder settings
• Setting the protection relay to test mode
• Selecting language
ADMINISTRATOR
• All listed above
• Changing password
• Factory default activation
For user authorization for PCM600, see PCM600 documentation.
2.6.1 Audit trail
The protection relay offers a large set of event-logging functions. Critical system and
protection relay security-related events are logged to a separate nonvolatile audit trail
for the administrator.
Audit trail is a chronological record of system activities that allows the reconstruction
and examination of the sequence of system and security-related events and changes in
the protection relay. Both audit trail events and process related events can be
examined and analyzed in a consistent method with the help of Event List in LHMI
and WHMI and Event Viewer in PCM600.
Section 2 1MRS756378 S
REF615 overview
28 REF615
Application Manual
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