GE DR60, Technical Manual

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DR60
102 DR60-TM-EN- 2A
DR60
Digital Recorder
Chapter 9: Maintenance
This chapter provides information about proper equipment maintenance and
troubleshooting.
The troubleshooting part of the chapter allows an error condition on the IED to be
identified so that appropriate corrective action can be taken.
1 Maintenance
1.1 Maintenance Checks
In view of the critical nature of the application, GE Grid products should be checked at
regular intervals to confirm they are operating correctly.
The devices are self-supervising, most problems will result in an alarm, indicating that
remedial action should be taken. However, some periodic tests should be carried out to
ensure that they are functioning correctly and that the external wiring is intact. It is the
responsibility of the customer to define the interval between maintenance periods. If
your organisation has a Preventative Maintenance Policy, the recommended product
checks should be included in the regular program. Maintenance periods depend on
many factors, such as:
•
The operating environment
•
The accessibility of the site
•
The amount of available manpower
•
The importance of the installation in the power system
•
The consequences of failure
Although some functionality checks can be performed from a remote location, these are
predominantly restricted to checking that the unit is measuring the applied currents
and voltages accurately, and checking the circuit breaker maintenance counters. For
this reason, maintenance checks should also be performed locally at the substation.
Before carrying out any work on the equipment you should be
familiar with the contents of the Safety Section and the ratings on
the equipment’s rating label.
While the dr60 performs continual self-tests, it is recommended that maintenance be
scheduled with other system maintenance. This maintenance can involve in-service,
out-of-service, or unscheduled maintenance.