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Isolation Transformer and Subpanel recommendations

There are many isolation transformers out there new and used. What are the best recommended 5kVA/other isolation transformers for high-end audio setups. I live in the US so I need one that would be configurable for 110/120V output. I intend to put this on my dedicated circuit after my main panel in the house. The dedicated circuit is high-quality and 20-amp/10-guage in nature; this circuit is 110/120V, not 220. I'm looking for any recommendations for units that run quiet and have high common-mode noise rejection.

Also looking for recommendations on good quality sub-panels.

Thank you in advance for the assistance!
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jea48
4,395 posts
 
Zephyr24069,

I would feed the 5 Kva xfmr with 240V balance power.

If your plan was to install the xfrm by your audio equipment so you could use the existing dedicated circuit you now have, you can still use a 240V fed xfmr.

The existing dedicated branch can easily be converted to 240V. The #10 wire is rated for 600V.
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zephyr24069 OP
1,241 posts
 
Jea48: Thank for the help and advice; my plan is to install the transformer in an adjoining attic over a garage where any humming from the transformer will not be hear and any heat will dissipate. The attic does get hotter in the summers (have thermostat-controlled fans on either side of attic) but overall I think is the best option as I can also have a platform built to bolt the transformer to in the attic as well as investigating any vibration damping solution I might need to ensure the results are optimal.
jea48
4,395 posts
 
my plan is to install the transformer in an adjoining attic over a garage where any humming from the transformer will not be hear and any heat will dissipate.

Not a good idea..... I doubt you will find a licensed electrician that will do it.

Why not mount the xfmr on a wall in the garage. It can be mounted up high near the ceiling. (At least 12" down from the ceiling for heat dissipation)

Is the main electrical panel for the house in the garage?

Where are you planing on mounting the new electrical panel that will be fed from the xfmr?
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zephyr24069 OP
1,241 posts
 
The main electrical panel is in the laundry room, on an inside wall but adjoining the garage....I was either planning on mounting the new subpanel there or in the attack adjoining the room that has my system.
ngjockey
1,042 posts
 
For 240V, as an example...

http://www.ebay.ca/itm/FPE-5-KVA-1-Phase-240X480V-120-240-Volt-3R-SE2N5FS-Transformer-NEW-/310425276037?pt=BI_Circuit_Breakers_Transformers&hash=item4846c9ce85

Sola/ Hevi-Duty and Acme are usually the best bets for sheilded like this one. (the dashed line in the schematic)
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