Capacitor Capacitance Checking

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DIVINEWINDTECHNIK Participant Join Date: Dec 2012 Posts: 1	Capacitor Capacitance Checking 12/19/2012 4:52 AM
	Dear sir please help me to find the value of capacitance in micro farad from the given KVAR of the 3 phase capacitor Regards I. Dhanaraj Lazarus
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Joshi Guru Join Date: Oct 2007 Location: India Posts: 1246 Good Answers: 34	#1 Re: capacitor capacitance checking 12/19/2012 5:11 AM
	Search below: How do you decide KVAR rating of capacitor bank Power Factor Correction - Teknatool Power Capacitors - Cooper Industries
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32063 Good Answers: 838	#2 Re: capacitor capacitance checking 12/19/2012 5:57 AM
	<sigh> There has to be a manufacturer's name and telephone number on the casing somewhere? Where on earth is the User Manual that was supplied with it? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32063 Good Answers: 838	#3 In reply to #2 Re: capacitor capacitance checking 12/19/2012 6:41 AM
	...and surely it has a serial number on it? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Fredski Guru Join Date: Feb 2011 Posts: 7025 Good Answers: 207	#4 Re: Capacitor Capacitance Checking 12/19/2012 8:02 AM
	why are you questioning its farad rating/capacitance? if the out put isn't right have you checked the internal fuses?
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PeterT Guru Join Date: May 2010 Location: Liverpool, NY Posts: 961 Good Answers: 131	#5 Re: Capacitor Capacitance Checking 12/19/2012 8:07 AM
	Do a Google search on "convert KVAR to microfarad." It will give you many sites with an explanation and a simple formula to calculate your answer. __________________ To get the right answers, first you need to ask the right questions.
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V.I.Abraham Guru Join Date: May 2007 Location: Pune , India Posts: 875 Good Answers: 42	#6 Re: Capacitor Capacitance Checking 12/19/2012 8:32 AM
	Here is an answer given by one of our member "msmad" on 4-4-2010 which was rated good answer.Go through this thread and you can get further knowledge from google search . "In the power system, the capacitors are used for supplying the reactive power which is consumed by the reactive loads like motors. The unit of reactive power is kVAR. If you know the capacitance value, and voltage and frequency of the system, here is how to find the kVAR: (1) Find the capacitive reactance, Xc: Xc = 1/(2 x PI x f x C) ohm Where C = capacitance in micro-farads, f = frequency and PI = 3.14 (2) Find the kVAR rating of the capacitors: kVAR = (Vn)²/(Xc x 1000) Where, Vn = Voltage applied to the capacitor terminals For the 3 phase system, the total kVAR rating is 3 times of this kVAR value. The previous thread http://cr4.globalspec.com/thread/54230 also will help. - MS " I think this may help you. You can always go through on threads on similar questions in CR4 to get guidance.
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Fredski (1); Joshi (1); PeterT (1); PWSlack (2); V.I.Abraham (1)

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