Maintenance And Periodical Testing; Maintenance; Periodical Testing - ABB RELION REX640 Operation Manual

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Maintenance and Periodical Testing

8.1 Maintenance and Periodical Testing
The following sections are discussing selected aspects in regards the maintenance
and periodical testing of REX640 Protection and control relay. The maintenance
activities are here referred as specific actions, documented by the relay
manufacturer, to be performed to the relay according to predefined time intervals.
There are several factors influencing the optimum frequency of periodical testing,
as well as the method of testing. Local legislation, insurance policy terms,
customers' own maintenance practices, level of technology used in the installation
and other similar issues certainly have an impact which is not possible to
comprehensively cover here.
These sections do not discuss the personnel work safety related issues, nor the
expected skill level of the testing and maintenance engineers or technicians. These
are obviously of paramount importance but must be instructed and supervised by
the party responsible.
8.1.1

Maintenance

REX640 protection and control relays do not require any specific periodical
maintenance when installed and operated according to the manufacturer's
instructions and within the specified environmental conditions. The relays shall be
kept clean and free of dust and yearly visual check of installation's condition is
recommended. Retightening of relay's screw type terminals is recommended after
the first three to six months in use.
As a part of our quality assurance process, we constantly analyze the data from
the installed base. In case a systematic anomality would be identified, we will take
specific actions. The actions are highly dependent on the nature of the anomality
and could include targeted maintenance advice for a dedicated relay batch, or it
could be more general advisory based on the years of relay in operation.
As a part of our products' lifecycle support activities, we publish firmware updates
offering functionality enhancements for the delivered units. The REX640 users
are encouraged to visit the REX640 product page to check the latest firmware
updates. Each firmware update includes a release note, describing the content, and
a link that can be used to download the actual firmware package. Relay specific
REX640 serial number is required for downloading. Depending on the firmware
patch content and the evaluated criticality of it, the relay update can be performed
soonest or as mostly done, during the periodical testing of the relay. Updating the
relay firmware with a patch does not itself require relay retesting.
8.1.2

Periodical Testing

Precondition for efficient and successful periodical testing is that the installation
has been comprehensively tested before it has entered the commercial use, the
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Operation Manual
Maintenance and Periodical Testing
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