Setting Passwords; Identifying Relay Application Problems - ABB RELION REX640 Operation Manual

1MRS759118 D
6.3.6

Setting passwords

IED Users in PCM600 is used to manage user accounts.
User accounts can be created under any default roles (VIEWER, OPERATOR,
ENGINEER and ADMINISTRATOR) or additional roles (INSTALLER, SECADM, SECAUD
and RBACMNT). Only Administrator can create user accounts and update the roles-
to-rights mapping. Administrator needs to share the default password generated
for the user account by the tool with the users and recommend the user to change
the password.
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6.3.7

Identifying relay application problems

• Check that the function is on.
• Check the blocking.
• Check the mode.
• Check the measurement value.
• Check the connection to trip and disturbance recorder functions.
• Check the channel settings.
6.3.7.1 Inspecting wiring
The physical inspection of wiring connections often reveals the wrong connection
for phase currents or voltages. However, even though the phase current or voltage
connections to protection relay terminals might be correct, wrong polarity of one or
more measurement transformers can cause problems.
• Check the current or voltage measurements and their phase information from
Measurements page > Phasors.
• Check that the phase information and phase shift between phases is correct.
• Correct the wiring if needed.
• Check the actual state of the connected binary inputs from Testing and
Commissioning > View I/O.
• Test and change the output states manually in Testing and Commissioning >
Force Outputs.
6.3.7.2 Sample data interruptions
Occasionally protection relays can receive corrupted or faulty measurement data
during runtime. In these cases the operation system halts the corresponding
application execution until correct data is received. In case of permanent faults,
the measurement chain should be checked to remove the origin of the faulty
measurement data.
REX640
Operation Manual
In IED Users or on the LHMI, change the password of the user account.
Log in as administrator to reset the users' passwords. For more information on
user management, see the cyber security deployment guideline.
If the administrator password is lost, contact ABB's technical
customer support to retrieve the administrator level access.
Troubleshooting
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