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Old 2nd January 2007, 11:51 PM   #1
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Default diy balanced power unit question

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Hi everyone,

Attached I have a diagram of my diy balanced power setup. I was wondering if my ground is wired in an optimum way, or if there are things I should change?

Also, would it be worth while sticking a emi/rfi power line filter between the 2 outlets to help isolate analogue from digital, and would I also attach the new filter to the same ground?

Thanks,

Biggie.
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Old 2nd January 2007, 11:58 PM   #2
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Biggie, I have created a new thread for you.

After you search, click the "have you searched" button in the upper left. That will allow you to start a new thread.
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Old 3rd January 2007, 03:30 PM   #3
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Nope.

Term #1 & #4 to input High
Term #3 & #6 to input low

Term #8 & #10 to output high
Term #9 & #11 to output low

Term #7 to Case Ground

Socket Safety Ground to Case Ground
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Old 3rd January 2007, 07:12 PM   #4
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Default Re: diy balanced power unit question

Quote:
Originally posted by NotoriousBIG_PJ
Also, would it be worth while sticking a emi/rfi power line filter between the 2 outlets to help isolate analogue from digital, and would I also attach the new filter to the same ground?
Hi Biggie and welcome to the forums!

I built myself a couple of power conditioners using line filters and balanced transformers. It is my experience that an emi/rfi line filter on the secondary of a balanced transformer is not really necessary. For more details, you can check out my website with the completed projects (called Gridmox1 and Gridmox2). The text is in Croatian but the pictures are self-explanatory. Just holler if you need more specific info.

Regards,
Milan
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Old 3rd January 2007, 08:56 PM   #5
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Thanks for the replies. ^^

Quote:
Originally posted by Kevin Graf
Nope.

Term #1 & #4 to input High
Term #3 & #6 to input low

Term #8 & #10 to output high
Term #9 & #11 to output low

Term #7 to Case Ground

Socket Safety Ground to Case Ground
I'm not sure what you mean by input High, input low, output high and output low. Are they 4 seperate grounds?

Biggie.
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Old 3rd January 2007, 11:28 PM   #6
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You better be careful or you may hurt yourself and/or blow something up!

High = Hot, Black wire
Low = Neutral, White wire
Safety Ground = Green or Green/Yellow wire

The "Low" wires are Neutral not Ground!
In the primary the Neutral is connected at the house main circuit box to the Safety Ground.
In the isolated secondary the Neutral is not connected to the Safety Ground in any way.

Oh WAIT - - THIS IS A BALANCED SECONDARY NOT AN ISOLATED SECONDARY !!!

Do it this way:

Term #1 to input Hi
Jumper Term #3 to Term #4
Term #6 to input Low

Term #7 to Case Ground and input Safety Ground

Term #8 to output High
Term #11 to output Low

Jumper Term #9 to Term #10 then to:
Socket Safety Ground then to:
Case Ground and input Safety Ground
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Old 3rd January 2007, 11:40 PM   #7
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Looking at your drawing again.
The Secondary wiring is OK.

But if all four windings are 115/120 Volt.
Wiring the Primaries in parallel and the Secondaries in series.
Will OUTPUT 240 VOLTS.
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Old 3rd January 2007, 11:54 PM   #8
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Just to clarify, I've had this conditioner running for over a year and a half. I did the grounding based on this Jon Risch quote:

"If a technical ground as described in the equi=tech article is not constructed according to the proper method and connections, then the original AC ground should be used for all the grounds."

And the "case ground" in my diagram is just a large screw inside of the case, attached to the bottom that was used as the ground for the unbalanced oneac conditioner that used to be in the case. I think I'm using the wrong terminology for it.

Biggie.
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Old 3rd January 2007, 11:54 PM   #9
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I'm getting 60/60 reading from the outlets.

Biggie.
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Old 3rd January 2007, 11:54 PM   #10
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Quote:
Originally posted by Kevin Graf
Do it this way:

Term #1 to input Hi
Jumper Term #3 to Term #4
Term #6 to input Low

Term #7 to Case Ground and input Safety Ground

Term #8 to output High
Term #11 to output Low

Jumper Term #9 to Term #10 then to:
Socket Safety Ground then to:
Case Ground and input Safety Ground
Can you explain the difference between case ground, input safety ground and socket safety ground?

Thanks,

Biggie.
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