Brian O'Connell wrote:
> Sir,
>
> Please do not take as flame.
No incineration here.
>
>
> I've yet to work at a company, that make products for connection to AC
> mains, intended for use in multiple countries, and being both serious &
> professional about testing for compliance and performance, that did not have
> at least one of these instruments in the lab.
Did Mike say this was his intended use?
>
>
> Please visit the web pages of Elgar, Pacific Power, Agilent, etc. The
> requirement should be obvious.
I am very familiar with this type equipment. If you are familiar with this type
equipment you should also know that an Elgar covering this power range, variable
from say 40 to 400 Hz costs upwards of $25K, takes 5 rack bays to house, and 6
weeks to order in.
On the other hand if Mike is simply looking for something to make 50 Hz from 60
Hz then a simple motor gen set costing a few $K will do the job.
Finally if Mike is really trying to hook up a single phase load to a 3 phase
main, then all he needs is the right transformer. <$1K
The operative word here is "variable" and in what context. It seemed obvious to
me that Mike was not familiar with this subject and could have mis-specificed
his requirements, i.e. did he say variable when he meant compatible?
Fred Townsend
>
>
>
>
> -----Original Message-----
> From: Fred Townsend [mailto:[email protected]]
> Sent: Thursday, May 10, 2001 1:42 PM
> To: Mike Stone
> Cc: [email protected]
> Subject: Re: looking for used power supply
>
> I can see why you might have difficulty finding such a device. Your
> specifications are ambiguous.
> Do you really mean variable frequency or the ability to operate from either
> 50 or 60 Hz mains.
> Ditto for variable voltage.
> 3000VA makes no sense in the context of 120VAC or 230VAC at 16 amps.
>
> It is not clear what commercial benefit such a device would have (except to
> separate a fool and his money) so I am skeptical you would ever find such a
> device used.
>
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