Yes my good doctor that is one of the ways to achieve electrical isolation and decoupling from the AC mains. I use a larger industrial version Signal Transformer Company unit rated at 75 amps. In an audio application actual audio 1:1 audio transformers such as the old UTC A-20. Modern-day units like the Jensen can virtually accomplish the same thing in audio applications. Basically, I utilize both with the CROW mobile remote truck. And it's amazing at how few problems I ever have because of that.
The electrical isolation transformer has a dual secondary where the 2 low sides are tied together (creating a center tap) to create my neutral. In a sense, everything in my truck has no electrical ground whatsoever. Most electricians look at it and are totally confused. So really the electrical isolation transformer is nothing more than a gigantic audio transformer that does not have to deal with frequencies much above or below 60 Hz in frequency response. On the primary side, I simply only require the need to connect to 2 hot phases of 208/220, sans neutral. Because without connecting to the AC power mains without any ground or neutral, no one understands how that could work? Which the electricians find twice as confusing. The body of my box truck is 100% wood. So there is no chance of any electrocution. The video basically describes exactly that with what you have posted from YouTube. And it was truly amazing between my direct electrical coupling and the electrical isolation transformer how much quieter everything that electrically. When necessary, I can bypass the electrical isolation transformer which then does require connection to AC power mains neutral. People have been confused between the difference of electrical neutral and ground. They both virtually have the same potential whereas the ground actually is ground and not neutral. I think even I'm confused? But then I've always been confused most of my life so... this just follows with my illogical logic.
In audio circuitry, sometimes lifting your ground is sufficient to prevent ground loop hum. This is basically translated also an electrical manner when using the AC power mains electrical isolation transformer. So I am actually electrically wired ground lifted with the AC power mains electrical isolation transformer. My AC power wiring is therefore wired as audio which is actually not to electrical code. But this is not a facility that has to live up to a permanently installed studio within a dwelling that does have to follow electrical code. And no inspectors were involved with the approval process of my Remote Truck because in and by itself, it did not require any state/county inspections. Yet there is still no danger from electrocution because of this complete isolation. KOOSTER McAllister from Record Plant Remote actually turned me on to this 20 odd years ago. So when I am connecting to AC electrical mains at certain jobs/venues an electrical neutral is taken but is not connected to my truck nor the electrical isolation transformer primary input side. It's wacky I know but it works great. And the same can be applied to a permanent dwelling studio in one's home or in one's warehouse after all inspections have been completed beforehand. Though this is not what one would call " balanced power " from devices when measured with reference to ground shows 60 V on one side of the Edison connector and 60 V on the neutral side of the Edison connector. But it still is truly a balanced power distribution concept executed in a slightly different manner. Maybe executed isn't a good word to use? LOL
After I posted this, I found this additional explanation that may further help everybody understand.
http://www.youtube.com/watch?v=E3-gA-f9GN0&feature=related
Note: you should still always utilize an AC voltmeter. Because even in this application, one can still have internal ground loop issues within your studio audio and electrical wiring.
Mx. Remy Ann David
