Induce a Phase Unbalance.

[broc028]

Hi guys,

I want to conduct an experiment, but need a little help.

I want to create a voltage phase unbalance on a small three phase system an monitor the current unbalance.

My question is this. Is there a simple method of inducing a small voltage unbalance?

 

[ScottyUK]

Depends on how much current we're talking about and how big a volt-drop. Could be as simple as adding a little resistance or reactance into one of the lines, or you could get into all sorts of tricks with transformers connected in series with the line to buck or boost the voltage.


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If we learn from our mistakes I'm getting a great education!

 

[dpc]

Will this be bench test or a field test on an installed motor?




"The more the universe seems comprehensible, the more it also seems pointless." -- Steven Weinberg

 

[broc028]

It is a field test on an installed motor.

The motor is running at 230V, pulling around 1A, maybe a bit more.

I am only looking at creating 2-3% unbalance.

 

[sibeen]

Place a variac in one of the lines. That way you can then adjust the amount of inbalance.

 

[waross]

I was going to say

Place a variac in one of the lines. That way you can then adjust the amount of inbalance.

but sibeen said it first.

Bill
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"Why not the best?"
Jimmy Carter

 

[broc028]

Thanks guys, worked a treat!