5.2.4 Relay self-supervision
The relay self-supervision handles internal run-time fault situations.The main indication
of an internal fault is a flashing green Normal LED.
Internal faults can be divided to hardware errors, run-time errors in the application or
operating system and communication errors. Further actions always depend on the cause
of the error.
Only authorized and skilled personnel should analyze the errors and
decide on further actions.
The protection relay records system registrations, relay status data and events.
Document all the recorded data from the protection relay before resetting
the tripping and relay lockout functions.
5.3 Relay parametrization
Protection relay parameters are set via the LHMI, WHMI or PCM600.
Setting parameters need to be calculated according to the electrical network conditions
and the electrical characteristics of the protected equipment. The protection relay's
settings need to be verified before the protection relay is connected to a system.
Document all changes to parameter settings.
For more information, see the PCM600 documentation.
5.3.1 Settings for relay functionality
Function settings can be edited one by one by navigating to the individual setting values,
for example via the LHMI. The values in other setting groups should be known before
editing a certain setting value.
1MAC456939-IB D Section 5
Protection relay operation
620 series ANSI 79
Operation Manual
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