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Re: Choke for pole xformer

Posted By: John Anderson
Date: Thursday, 6 September 2007, at 4:44 a.m.

In Response To: Choke for pole xformer (Kent)

> I'm looking for a choke(preferably a DC
> reactance type) for a 10KVA utility
> tranformer. I was wondering if I could just
> buy one "off the shelf" for that
> KVa rating or if there were any special
> considerations in using such a transformer
> as a bombarder. Thanks for any
> help/suggestions.

A slide choke will probably work better with a pole pig. Reason being the pole has no magnetic shunts and tend to be a little jumpy. They can work though - especially if you add a reactance coil (such as from a welder) in series. Some people have made their own reactance coils with motor wire and steel rods, old power transformers, old slide-chokes, etc.

As to the KVA rating - yes, you can have a place make one for you. Make sure you tell them duty cycle will be around 30-50% - otherwise they'll make (and charge you for) one that's much bigger than you need. They will want to know what type of control voltage you'll be using - unless they supply that part of the circuit too. It's fairly easy to supply 0-10v or 0-12v dc with a simple circuit. But you'll need to match whatever the design of the choke it.

Messages In This Thread

• Choke for pole xformer -- Kent -- Monday, 3 September 2007, at 10:14 p.m.
  • Re: Choke for pole xformer -- John Anderson -- Thursday, 6 September 2007, at 4:44 a.m.
    • Re: Choke for pole xformer -- Kent -- Thursday, 6 September 2007, at 12:30 p.m.

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