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Motor Relay P.u.


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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.
"He's not dead, he's just pinin' for the fjords!"
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That would be my understanding also.


Best regards,

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