Hooking up two Topaz Isolation trans. in series?

You might consider running your entire system from one 5 KVA (or greater) isolation transformer so as to not bottom out your transformer. Check out my power filtration system in my system.

Cford, I read on a post at audiogone were someone said they hooked two of these in series. I too was wondering about how the current would be increases by this as only so much current could go through the first topaz.

Usually that is done for greater common mode noise rejection and not current handling. I bought six 1.5Kva Topaz transformers from a guy who used them all in series. I think each one has 146dB CM noise rejection and he wired them in balanced mode to up that to 220dB(if I remember correctly).

When sizing an isolation transformer, it is important to know the peak power (worst case) of all componants which will be attached and then multiply that by 2-3 times. Source componants such as a CD player vary very little with music levels, however, your amp may have an instantaneous peak power level of more than twice the level with no input.

While you can put selected componants on different isos, there is in general no advantage over using one properly sized for all. The one exception is you might consider putting the digital componants (i.e., CD) on a second smaller iso to keep them from contaminating the rest of the componants.

If you look at my system, you will see architecture and wiring diagrams of how I did this.

If I hook two topaz 1kva iso ultra transformers in series will I double the current capacity? I already have one 1kva topaz and am looking at another. Two of these at 16 amps would be enough for everything in my audio rack.
Roddey99

Roddey99,

To increase the amperage you would parallel the secondary windings of the two transformers together. Care must be taken to insure the two secondaries are in phase with one another. The proper polarity must be observed otherwise the two transformers will buck one another....

Also both transformers must be of the same VA and voltage rating. Best if both transformers are of the same manufacture and model number for secondary windings resistance matching.

In fact, with two transformers in series, you would get slightley less power (1-2%), due to the iron losses of the second transformer. There is no free lunch in Mother Nature.
You will get more isolation, but ALL transformers add slight distortions, so you may be trading isolation for unwanted AC harmonics.
I have measured increased 5th, 7th and 9th harmonic distortion of the AC waveform out of a Felicia DIY project (two isolation transformers in series, with filtering caps in-between).
Google Felicia...I read all the gushing comments and wasted U$ 200 on two custom 500W iso transformers. I heard distortion in the treble, it was confirmed by borrowing a friend's AC harmonic distortion analyser.
Bummer...my Cd player sounds much better connected directly to the wall receptacle.

In order to implement iso transformers correctly and get rid of ground loop issues, I suggest that you read the following paper:
http://www.exactpower.com/assets/pdfs/theTRUTH.pdf

Good luck