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Re: ASRSG question

Original poster: Esondrmn@xxxxxxx


Do you have a safety gap across the rotary gap? If not, you should add one. I had a 60 hz resonance problem with my 5 kva transformer and the welder being used for ballast at one time. It blew one of my commercial caps. The primary tank voltage was going to some extremely high level. I added a safety gap directly across the cap just for a test and it fired like a rifle. I then moved it to across the rotary gap and it was still firing. I removed the welder and used a large variac core for ballast and now the safety gaps never fire.

Ed Sonderman

>Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

>I tried both .1 uFd and .2 uFd. .2 uFd is a pretty big capacitance,
>I know, but the 3500 rpm is the MAX rpm rating of the motor
>and I wasn't running it at its max rpm. The rsg motor is a DC
>with infinite speed control via a variac but I can't really tell ex-
>actly what rpm I'm running. I can only aproximate it by measuring
>the input voltage and multiplying the product of the input volt-
>age/130 since 130 VDC is the rated voltage of the motor. I
>figured the 15 kVA pig can charge even a pretty large primary
>cap pretty fast although I haven't done the exact math on this
>with JAVATC yet.
>The pig is ballasted with a the guts of a 225 Lincoln arc welder
>set at its maximum (225 amp) weldeing setting and I am using
>(2) .1 uFd, 50 kV Hipotronics pulse caps for either .1 uFd
>byt using just one, or .2 uFd buy paralleling them.