overwritten with the default values. During normal use, a sudden
change of the settings can cause a protection function to trip.
7.3.3
Setting the password
If user authorization is off or the user is logged in as an administrator, user
passwords can be set via the LHMI or WHMI or with PCM600.
The password can be set to write mode with engineer or operator
rights but the changes to the password are not saved.
1.
Select
Main menu/Configuration/Authorization
.
2.
Select the password to be reset with
or
.
3.
Press
, change the password with
or
and press
again.
4.
Repeat steps 2 and 3 to set the rest of the passwords.
7.3.4
Identifying IED 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.
7.3.4.1
Inspecting the 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 IED 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
Main menu/Measurements
.
•
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
Main menu/
Monitoring/I/O status/Binary input values
.
•
Test and change the relay state manually in
Main menu/Tests/Binary outputs
.
1MRS756708 C
Section 7
Troubleshooting
615 series
93
Operation Manual
