Re: Line Filters
In general, a line filter is a form of Low Pass Filter, with the cutoff
chosen to be somewhat above the operating frequency (normally 60 Hz in US
applications). A 400 Hz filter would just have a higher cutoff (maybe, it
might even be the same, say 10 kHz), so I wouldn't expect any problems.
The problems with running 400Hz parts at 60 Hz would stem from inductances
across the line or capacitances in series (where the impedance would be too
low or high at 60 Hz, respectively), neither of which is likely to be the
case in a low pass line filter.
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: Line Filters
> Date: Thursday, February 10, 2000 1:39 AM
> Original Poster: dhess1-at-us.ibm-dot-com
> I just received a pair of 70 amp, 3 phase line filters at a price that
> to good to pass up; Free. My intent is to use them with a pig I received
> through Dr. Resonance last year.
> Problem is that these are designed for 400 cycle (at 480 volts) and am
> wondering if they will work OK on 60 cycles.
> I understand that a variac or transformer designed to operate on 400
> will fail in pretty short order if operated on 60 cycles but does the
> hold true with line filters? What about their ability to filter
> at 60 cycles?