Re: 15kVA 12.6kV pole pig (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 16 Jun 2007 14:08:31 +0000
From: David Rieben <drieben@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Cc: drieben@xxxxxxxxxxx
Subject: 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/
480 on its low voltage terminals instead of 120/240 since you are getting
better performance by center tapping the LV terminals?


David Rieben

-------------- Original message -------------- 
From: "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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