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Anonymous Poster	UPS Ratings 05/29/2009 4:33 AM
	Dear Sir, We have to install a plate processor using 3 phase input supply (380-415V/50Hz).The machine requires 4kW max. on any one phase with 16 A per phase current consumption. Please let me know the formula to calculate the total power of the machine in kW & a formula to calculate the rating in kVA of the required UPS (power back-up source). Whether a 5kVA or a 15 kVA UPS should be installed? Sanjeev
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dineshpandit80 Commentator Join Date: Mar 2009 Location: delhi india Posts: 79 Good Answers: 2	#1 Re: Need suggestion for correct UPS rating 05/29/2009 5:16 AM
	as we all know that Ups system is unbalanced load system .so if one phase have current of 16A then totel current in three phase is 163=48A So totel Kw of load is vicos$ sothis wll equal to 23048*.95=10.488 kw or 11.04 kva so you should install a 15 kva ups
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You might be interested in: KVA Meters, Three Phase Uninterruptible Power Supplies (UPS), Uninterruptible Power Supplies (UPS)

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