RE: Ballasting a Pole Pig (Revisited)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Carl Litton" <Carl_Litton@xxxxxxxxxx>

Hello Gerry,

Barring any mitigating factors, your calculation is in fact the correct
one.  120 mH will give you 45 Ohms inductive reactance at 60 Hz and will
have you limited down to 5.3 Amps max at 240 VAC.  This is way too high.

You need 8 Ohms to have a 30 Amp max.  You need a little over 21 mH to
produce 8 Ohms of 60 Hz reactance.

Carl Litton


-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Thursday, January 12, 2006 1:48 PM
To: tesla@xxxxxxxxxx
Subject: Re: Ballasting a Pole Pig (Revisited)

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi D C,

OK, then what am I missing???

Isn't 120mh, 45 ohms reactance at 60 Hz??? and doesn't 45ohms limit
the current to 5.3 amps at 240 Vac???  or are you assuming a
secondary Cp that reflects back to the primary and cancels some of
the 45 ohms reactance??? If so, what are your assumptions.

Please tell me before I cut my gap too wide in the toroid ballast Im
building.

Gerry R


>Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
>
>
>No.  120 mH provides control with 30 Amps as the max amount that may be
drawn.
>
>Dr. Resonance
>
>
>>Hi Dr R,
>>
>>120mh is 45 ohms at 60Hz.  At 240Vac, this would limit the current
>>to 5.3amps or ~1.2KVA.  Is this in error or Im I missing something??
>>
>>Gerry R