Re: 15kVA 12.6kV pole pig (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 16 Jun 2007 09:06:06 -0700 (PDT)
From: J. Aaron Holmes <jaholmes@xxxxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 15kVA  12.6kV pole pig (fwd)


I'm wondering if you're just overpowering your RSG. 
In general, going from 5kVA to 15kVA by just adding a
bigger transformer and a bigger capacitor is going to
be problematic; other things need to get bigger too. 
A small-diameter RSG is not going to cut it at pig
powers without help (e.g., series static gap, air
blast, etc.)

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> 
> ---------- Forwarded message ----------
> Date: Sat, 16 Jun 2007 10:28:24 -0400
> From: timjroche@xxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: 15kVA  12.6kV pole pig (fwd)
> 
> 
> david,
> 
> 
>    yes, i am sorry, it is Tim, thank you.
> according to the factory
> nameplate, it is a 120/240 LV. FYI - HV has a 5
> position switch for
> incramental voltages from 12,600 down to 10,500 VAC.
> 
> -----Original Message-----
> From: Tesla list <tesla@xxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Sent: Sat, 16 Jun 2007 6:40 am
> Subject: Re: 15kVA 12.6kV pole pig (fwd)
> 
> 
> 
> 
> 
> --------- Forwarded message ----------
> ate: Sat, 16 Jun 2007 14:08:31 +0000
> rom: David Rieben <drieben@xxxxxxxxxxx>
> o: Tesla list <tesla@xxxxxxxxxx>
> c: drieben@xxxxxxxxxxx
> ubject: Re: 15kVA  12.6kV pole pig (fwd)
> Hi , is it Tim?
> Are you sure that your newly aquired pole
> transformer isn't rated for 240/
> 80 on its low voltage terminals instead of 120/240
> since you are getting
> etter performance by center tapping the LV
> terminals?
> 
> avid Rieben
> -------------- Original message -------------- 
> rom: "Tesla list" <tesla@xxxxxxxxxx> 
> > 
>  ---------- Forwarded message ---------- 
>  Date: Sat, 16 Jun 2007 01:57:34 -0400 
>  From: timjroche@xxxxxxx 
>  To: tesla@xxxxxxxxxx 
>  Subject: 15kVA 12.6kV pole pig 
>  
>  i have recently went from two Westinghouse PT's
> (about 5kVA) to a 15kVA 
>  pole XFR. Holy Squirrelly!! i am running SRSG 3600
> RPM 4flying (.5" 
>  tung.)/2 station (.5" german silver). 0.1 uf
> hipotronics 70kV RMS tank 
>  cap. 
>  
>  my biggest issue, besides the obvious current
> limiting, is getting the gap 
>  to quench. went to 8 pole flying and basically made
> a jacobs ladder around 
>  the rotor. like no quench at all. so back to 4
> flying. am i way off or is 
>  this a impedance problem on the LV side of pole
> XFR? BTW - i get nothing 
>  but 60 cycle hum or saturation using 220 VAC RMS
> across the LV windings. 
>  yet if i hook up my 220 VAC RMS with one leg on the
> CT or hooking it up 
>  like 110 VAC RMS, i get much better performance.
> for those interested, i 
>  was using a 1256 variac as voltage control and a
> 1156D as phase ajustment. 
>  Now i have put a 3-stack 60 amp inline current
> limit. i first put 220 
>  across it and turned the wipers till i was pulling
> 40 amp. then put it in 
>  series. it is still only a 3 to 4 foot streamer.
> with my PT's, i can get 2 
>  -3 streamers 6 to 7 foot long. 
>  
>  Thoughts? 
>  Suggestings? 
>  Ideas? 
> 
>
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