[Amps] Transformer ?

[James R Carr]

Boy that takes one back a few years. Another one used by PUD's in Eastern 
Washington was the corner grounded delta. Since one leg was grounded the 
fuse in that leg was replaced by a length of copper tubing. One doesa not 
want to fuse a grounded conductor.
Jim
N7FCF
----- Original Message ----- 
From: "Jim W7RY" <w7ry at inbox.com>
To: "Paul Kraemer" <elespe at lisco.com>; "AMPS" <amps at contesting.com>
Sent: Saturday, July 24, 2010 8:05 AM
Subject: Re: [Amps] Transformer ?


> Some info here:
>
> http://www.electriciantalk.com/f9/120-240-volt-3-phase-delta-high-leg-5166/
>
> 73
> Jim W7RY
>
>
>> -----Original Message-----
>> From: elespe at lisco.com
>> Sent: Fri, 23 Jul 2010 21:33:34 -0500
>> To: amps at contesting.com
>> Subject: [Amps] Transformer ?
>>
>> Question for the commercial power utilities guys:
>> Is there an advantage to delta / delta or delta / wye isolation
>> transformer
>> for 480 vac 3ph to 240 vac 3ph?
>> The load is scr controlled resistance heat apparatus and voltage is fixed
>> at
>> 240 vac 3 ph
>> When the load was dc drives it seemed that drive always wanted a wye
>> source
>> from the transformer?
>> Shopping internet for a rather large isolation transformer and am
>> concerned
>> about making the best choice
>> Any 150kva units out there in your surplus?
>> Thanks for any help and opinions
>> Paul K0UYA
>>
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