240v-120v Transformer Recommendation Wanted

Discussion in 'Home Theater Projects' started by PaulT, Nov 2, 2003.

  1. PaulT

    PaulT Supporting Actor

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    Dale, not sure why you would want to go the transformer route on this.

    If your Main Panel has enough space and capacity for the 1 x 30 x 240, then why not run 2 x 20 x 120 circuits and forget about transformer noise and heat generation? Have the wires for the 30A 240V already been pulled?
     
  2. Matt_Doug

    Matt_Doug Stunt Coordinator

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  3. PaulT

    PaulT Supporting Actor

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    OK, to me Balanced Power is 60+60=120 for our North American applications, but perhaps you want to take 120 off each leg of the 240 - not really the same thing IMHO, unless you are then going to balance each half.

    Here are some links for you to check out for some commercial equipment. In most cases for 120V balanced they are using 2kVA transformers or better:

    Equitech
    http://www.equitech.com/products/xfmrs/xfmrs.html
    BPT
    http://www.b-p-t.com/

    These guys may be able to help you out with a transformer:
    http://www.elect-spec.com/
     
  4. MikeTz

    MikeTz Stunt Coordinator

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    Here is the good news and the bad news. The good news is you can use the 240V, 30A outlet to power a 3KVA balanced power unit that should run all of your components (search on Equi=Tech). The bad news is a 3KVA bifilar transformer weighs around 80 pounds. The good news is the transformer will run cool and quiet. An Equi=Tech unit will give you 5 or more duplex outlets for your components and provides enough power to run high current amps (unless you plan on running several Krell monoblocks).

    One more piece of bad news, an Equi=Tech 3KVA balanced power unit costs roughly $3500. Those big transformers are heavy and expensive.

    MT
     
  5. Chu Gai

    Chu Gai Lead Actor

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    OTOH, you could run a subpanel with an isolation transformer...
     

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