ABB REL 551 2.3 Series, Installation And Comissioning Manual

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79
Automatic reclosing function (AR)
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Otherwise, a separate timer or recorder can be used to check the
AR open time and other timers.
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They can, for example, be Live busbar and Dead line.
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Observe or record the BR operation. The BR relay should trip and
reclose. After the closing operation, the SRY switch could be
opened for about 5 s and then closed.
The AR open time and the operating sequence should be checked,
for example, in the event recording.
Check the operate indications and the operate counters.
Should the operation not be as expected, the reason must be inves-
tigated. It could be due to an AR Off state or wrong program selec-
tion, or not accepted synchro-check conditions.
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The signal sequence diagrams in the Technical reference manual
can be of guidance for the checking.