My advice would be to us a programmable AC source. It provides all the
isolation and flexibility with an undistorted waveform. You can vary the
frequency from 35 Hz. to 2000 Hz, and the voltage from 0 to 240 volts. The
unit can be used for generation of EMC transients and surges as called out
in the IEC 1000 series and can be used to measure the effects of power
quality anyway in the world. It comes in single and three phase versions.
Good to 20 amperes but there are smaller versions. If you want to get the
supply call me and I will refer you to the company.
Dave George
Unisys Corp. 610 648 3653
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--
Does anyone know of a good method (or have any ideas) of how I could
reduce line voltage down to low (DC) levels in order to measure the line
voltage with an AD converter.
Using a transformer is obviously the easiest way and probably provides
the least potential problems with safety agencies. But transformers are
not (I don't think) terribly accurate and they are rather bulky even in
this sort of application.
What are the safety implications, for example, of just rectifying and
filtering the voltage and running it through a voltage divider?
Thanks,
Max Kelson
mkel...@es.com
