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Re: capacitive or sat.reactor ballast?
So then no one has any resons not to use capacitors for ballast? And I
know a resonant situation might be bad...but how do you calculate what
value for C would equal 60Hz resonance? I would amagine the 240V winding
exceeds my inductance meter.
Thanks,
Tristan Stewart,KC2EBM
>Hi Tristan,
> Reactive current limiting is used by Maxwell on their 100 kW 100 kV
>power supply. It works great. Be cautious of one thing though. If
the
>system resonates near 60 Hz the pig will fry. A little resistance
could
>help prevent this by dampening the circuit. Capacitors are a lot
lighter
>than arc welders. A lot cheaper too. You could use a bank of heavy
duty
>switches to choose the capacitors. This would give you adjustable
current
>limiting. Also, put a heavy duty fuse in the primary line. If a
capacitor
>shorts out the fuse will save the pig.
>
>
>-----Original Message-----
>From: Tesla List +ADw-tesla+AEA-pupman-dot-com+AD4-
>To: tesla+AEA-pupman-dot-com +ADw-tesla+AEA-pupman-dot-com+AD4-
>Date: Friday, November 06, 1998 11:03 PM
>Subject: capacitive or sat.reactor ballast?
>
>
>Original Poster: +ACI-Mad Coiler+ACI-
>+ADw-tesla+AF8-coiler+AEA-hotmail-dot-com+AD4-
>
>Greetings to all,
>
> I have been browsing around the ballast posts and since I have just
>got my first pig (wich will be another post) I need to start thinking
>about ballasting.
> I non-coiler suggested that I use capacative ballast, and since I
>havent heard of this being done on the list I assume there is something
>bad about it...please fill me in. He says that a 60uF cap will pass
>about 5A and I could make a parallel bank of them and put em in series
>with the pig. I actually just got a 3phase power monitor(as big as two
>washmachines+ACE-) and it had a bunch of 60uF 330V caps. I assume
330VAC is
>sufficient for 240V pig?
> Also, someone else suggested I make a saturable core reactor using
the
>core of my burnt out 50A variac. Any suggestions?
>
>I always appreciate constructive criticism,
>Tristan Stewart, KC2EBM
>
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>
>
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