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RE: 20 joules at 100 bps vs 4 joules at 500 bps
- To: tesla@xxxxxxxxxx
- Subject: RE: 20 joules at 100 bps vs 4 joules at 500 bps
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Tue, 09 Aug 2005 16:07:24 -0600
- Delivered-to: testla@pupman.com
- Delivered-to: tesla@pupman.com
- Old-return-path: <vardin@twfpowerelectronics.com>
- Resent-date: Tue, 9 Aug 2005 16:23:03 -0600 (MDT)
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Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>
I hate to propagate this never-ending thread that has no relationship to
its subject line, but...
> Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>
>
> Hi,
>
> The Freau formula's "1.7" factor is for NSTs. NSTs are very power
> limited and predictable so the formula works over a wide variety of
systems.
>
<snip>
Using the faceplate power rating on an NST may often, IMO, seriously
understate the true power consumption. Particularly when using LTR cap
sizes and a Variac-elevated higher than nominal mains voltage,
ferroresonance may occur and permit huge amounts of power to be drawn,
far in excess of the faceplate rating. My unmodified 15/60 NST, with a
faceplate rating of 900W, should pull just 7.5 Amps @120VAC. But the
reality is that under load, I peg my 20A meter @135VAC (this *with* PFC
caps).
Regards, Gary Lau
MA, USA