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Motor Relay P.u.
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Riyad
post Apr 24 2007, 06:42 AM
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Hi all,
What is meant by the motor relay was tested at 1.0 p.u. of FLA?
and what is greater 5.5 p.u. or 1.0 p.u?

Thanks
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jraef
post Apr 24 2007, 11:10 PM
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I've never been absolutely sure, but to me "p.u." means "per unit", a shorthand way of saying "multiples. So in your context, it means that the relay is tested at a multiplier of 1.0 x the FLA. It follows then that 5.5 p.u. would be 550% of FLA.


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marke
post Apr 25 2007, 02:05 AM
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Yes,
That would be my understanding also.

Best regards,


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