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Join Date: Sep 2017
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Rule of Thumb for When to Include Line Reactors and When to Not

03/16/2018 10:29 AM

So i have read from several places that the old rule of them and from other members on this board is

in regards to adding line reactors

If the transformer feeding it is greater then 10 times the KVA of the drive then you should add line reactors.

My question is, If you have one transformer feeder say 2 VFD's should you simply use the same rule but add the KVA of the two drives together?

Thanks for any thoughts

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#1

Re: Rule of Thumb for When to Include Line Reactors and When to Not

03/16/2018 6:59 PM

No. You base it on each drive individually. The danger is to the drive rectifier itself, so how many other drives are on the same circuit is irrelevant.

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Guru
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#2

Re: Rule of Thumb for When to Include Line Reactors and When to Not

03/19/2018 3:59 AM

Is <...the drive...> CE-marked?

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Commentator

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#3
In reply to #2

Re: Rule of Thumb for When to Include Line Reactors and When to Not

03/19/2018 9:07 AM

I believe so

Why do you ask?

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Active Contributor

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Location: Greater Memphis, Tn. Metro
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#4

Re: Rule of Thumb for When to Include Line Reactors and When to Not

04/09/2018 11:09 AM

You need to size the reactors for each individual drive and install in front of each drive independently.

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