Avoid the unnecessary restoring of factory settings, because all the
parameter settings that are written earlier to the relay will be
overwritten with the default values. During normal use, a sudden
change of the settings can cause a protection function to trip.
To restore factory settings from bootloader mode, press ESC + KEY
simultaneously for 5 seconds.
7.3.3
Setting passwords
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.
Local passwords can be changed only via the LHMI. Remote
passwords can be changed via the LHMI or WHMI or with PCM600.
1.
Select
Main menu/Configuration/Authorization/Passwords
.
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.
If the administrator password is lost, contact ABB's technical
customer support to retrieve the administrator level access.
7.3.4
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.
7.3.4.1
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.
1MRS758754 B
Section 7
Troubleshooting
REC615 and RER615
111
Operation Manual