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Join Date: Mar 2012
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Capacitor Panel Design

11/20/2013 10:34 PM

How to design a capacitor panel for an LT distribution substation of transformer capacity 500kva and a connected load of 615 kw and maximu demand of 415 kva

The major load is a water cooled chiller of 100tr x 2nos

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Guru
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#1

Re: capacitor panel design

11/20/2013 10:52 PM

Have you determined why you need a capacitor panel at all?

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#2
In reply to #1

Re: capacitor panel design

11/20/2013 11:24 PM

That should be "apparent".

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#3

Re: capacitor panel design

11/20/2013 11:39 PM

Two main approaches are:
1) Provide individual capacitor sets for each "larger" motor, switched on by the motor starters. Ignore the "smaller" motors.
2) Assess the total PF, and switch in appropriate combinations of capacitors with VAR ratings in power-of-two ratios (e.g., 1:2, 1:2:4, 1:2:4:8).

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Active Contributor

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#5
In reply to #3

Re: capacitor panel design

11/22/2013 9:59 PM

The assessment for a compensation of 25 kvar was made for the hvac equipments as per the hvac load details and pf requirements. Just would like to know the step by procedures for th design of apfcr for a new building. I have read that for trnsformers lvar compensation is 2% per kva

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#4

Re: Capacitor Panel Design

11/21/2013 2:14 PM

...and the way to do it is to discuss the problem with a capacitor panel design company, and get them to design it and install it.

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