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how to identify 3phase....r y b .A new make altnator how
to identify R
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Answer Posted / kj
On a new alternator the markings are usually U V W N
These match to R Y B N.
But it may be that the phase rotation in the building is
backwards and all the 3 phase motors will then run
backwards on the new alternator supply.
A phase rotation meter should be used to confirm that the
phase rotation is identical.
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