Re: [TCML] Calculating transformer output at lower voltages

[dave pierson <dave_p@xxxxxxxxxxx>]

> I know the usual formula Vs/Vp = Ns/Np for calculating transformer
> voltages, but I have a problem in that I am dealing with a sealed
> NST and don't know the number of secondary or primary turns.

    Generally, one can 'reverse' the math:
      if VS/VP = 12,000/110 = Ns/Np = 109.1
    then:
      109.1 * 30 =  3273

    
> What I am trying to do is calculate the output of a 12kV NST
> when it's getting less than 110 volts input. For example,
> if I feed the NST 30 volts AC, what does it put out?
    Looks like 3,273V, more or less.

> Is there any way to figure this out without a high voltage meter
> (which I don't have) and without knowing the number of primary
> or secondary turns?
    It gets complexer with current limited (as NST)
    transformers.

    best
     dwp
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