Re: Large Transformer Question w/ Formula (fwd)

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---------- Forwarded message ----------
Date: Sun, 15 Feb 1998 02:25:30 +1100 (EST)
From: Rodney Graham Davies <Rodney.Davies-at-anu.edu.au>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Large Transformer Question w/ Formula

Hi Guys,

On Fri, 13 Feb 1998, Tesla List wrote:

> Jeff and all,
>
> Tank cap size is a function of the transformer's output voltage and the
> operating frequency. The higher the output voltage, the larger the
> current capability needed. A rule of thumb is about 0.01 uF for every 60
> mA off a 15 kV transformer. For example, the following table can be used
> for approximate sizing:
>
>                     uF       uF
>                   Max -at-     Max -at-
>      kV    mA     60 Hz     50 Hz
>      ==    ==     =====     =====
>       9    30     0.008     0.011
>       9    60     0.018     0.021
>      12    30     0.007     0.008
>      12    60     0.013     0.016
>      15    30     0.005     0.006
>      15    60     0.011     0.013
>
> The table can be scaled for larger current values as appropriate.
>
> Hope this helps!

To make things easier on others who don't have a voltage & current
setting on the above table, use this formula.

1
C = --------------
2 * Pi * F * R