[Amps] Re Direct rectification of AC mains to derive the amp, VDD, supply

[peter chadwick]

Bill,

The supply is a neutral (which is theoretically at ground potential and actually may be so, or very close to it) and a single phase 240volt line - in my case 234, as it happens. The neutral is the centre point of the star connected (wye connected) sub-station transformer secondary, is grounded at the transformer and various places along its run. That run maybe in older installations a lead sheathed or steel wire armoured cable, with red yellow and blue phases on it, and in newer installations can be aluminium sheathed. The sheath or the armouring can be the neutral or there may be a neutral wire as well. Each house gets a tap of neutral and one phase, so house 1 gets red phase, house 2 gets yellow phase, house 3 gets blue phase and they all get the neutral. By using the aluminium sheath as neutral, "advantage may be taken of higher technology cable" i.e. cheaper!

73

Peter G3RZP


========================================
 Message Received: Sep 20 2013, 05:25 AM
 From: "Bill Turner" <dezrat1242 at yahoo.com>
 To: "Amps" <amps at contesting.com>
 Cc: 
 Subject: Re: [Amps] Re Direct rectification of AC mains to derive the amp,	VDD, supply
 
 ORIGINAL MESSAGE:          (may be snipped)
 
 On Thu, 19 Sep 2013 22:10:29 +0200, Peter wrote:
 
 >Does this explain it for you? I regret it isn't easy...Hell, standards people are involved and making it easy mean they aren't needed. I know - until June, I was one - although not in this field.
 
 REPLY:
 
 Just one question: What is the voltage relationship between neutral and each
 side of the 240 V lines? Is it split down the middle like in the US or is it
 connected to one side? Or something else? 
 
 Thanks,
 
 73, Bill W6WRT
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