Re: NST Inductance

• To: tesla-at-pupman-dot-com
• Subject: Re: NST Inductance
• From: Ed Phillips <evp-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sun, 02 Jan 2000 18:54:58 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Tesla List wrote:
> 
> Original Poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
> 
> Terry Fritz wrote:
> 
> > The voltage step up of a 15kV NST from 120VAC is 15000/120=125.  Since the
> > primary to secondary inductance is proportional to this number squared
> > (125^2=15625), the primary inductance would be 1300H/15625=0.0832H.
> >
> > That would give the NST on open load current of 120/(2 x pi x 60 x 0.0832)
> > = 3.83 amps.  The actual open load is around 0.3 amps.

	Don't confuse the magnetizing reactance (in your example about 400
ohms) with the leakage reactance, which is very much lower.

Ed

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