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sohil
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Join Date: Jul 2009
Posts: 2

Capacitor Banks

07/27/2009 6:21 PM

Recently in my plant in an 6.6kv vacuum bkr. fed motor feeder, i saw a capacitor bank of three nos. of capacitors connected in star connected in parallel, before motor.

What may be the utility of this capacitor bank ? Whether it may be a surge arrestor or something else ?
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jack of all trades
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#1

Re: capacitors in 11kv vacuum bkr. feeder

07/27/2009 7:14 PM

They sound like power factor correction capacitors connected across your three phase motor.

http://en.wikipedia.org/wiki/Power_factor

http://www.google.co.nz/search?hl=en&q=motor+power+factor+correction&meta=&aq=f&oq=

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msamad
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#2
In reply to #1

Re: capacitors in 11kv vacuum bkr. feeder

07/27/2009 7:51 PM

They are for sure the capacitor banks for power factor improvement for the lagging current drawn by the motor. Here, the capacitor banks and the motor act as a single unit of load resulting the power factor close to unity and the resultant current drawn by this system is less than the actual current drawn by the motor.

-MS

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PWSlack
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#3

Re: capacitors in 11kv vacuum bkr. feeder

07/28/2009 3:35 AM

Power factor correction, which is CR4's 3rd most popular topic behind busbar sizing and cable sizing.

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