3.4 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 the LHMI and can be enabled
with the Local override parameter via the LHMI path Main Menu/
Configuration/Authorization. WHMI always requires authentication.
Table 13: 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 DFRs and load profile record
• Changing system settings such as IP address, serial baud rate or
DFR 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.
3.4.1 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.
1MAC456939-IB D Section 3
620 series overview
620 series ANSI 31
Operation Manual
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