Many years ago, a local test lab in Newburyport, MA used decommissioned
hydroelectric
generators driven by electric motors for their AC mains testing.
For 50 Hz they dropped huge resistors (carbon piles???) in the river and
just loaded
down the motor-generators. The boiling river water, including some
pretty decent
parboiled seafood, was certainly something to behold.
See ya
Mike
On 9/7/2018 3:44 PM, IBM Ken wrote:
California Instruments or Pacific Power agile power supplies. 480VAC
60hz input, variable output. If >250V l-l is needed, add a step-up
transformer to the output. Pacific Power 3060MS cabinets can be
paralleled to significant output levels. I assembled a lab with about
half a megawatt of output power available from a seven cabinet system.
On Fri, Sep 7, 2018 at 3:15 PM, Doug Powell <[email protected]
<mailto:[email protected]>> wrote:
Greetings all,
In the past I've needed to produce three phase 50 Hz power to do
safety, EMC testing as well as certain validation tests. I've
used several methods including gas powered generators, electric
motor-generators with different sized pulleys and of course AC
Power Sources. Once again, I am faced with this need and must
make a choice as to which route to follow. As for budgetary,
rental is preferred over purchase and I am working in the 50 to
100 KVA range. I d need variable frequency as well as voltage
adjustment for high and low line. I have a small collection of
transformers to help with large voltage changes. Although I've
never done it, I am also aware that it is possible to configure
motor-generators with direct drive shafts and select the number of
poles and RPM to change output frequency.
My question is what method are most folks in this forum using when
it comes to 50 Hz higher power levels?
Thanks! Doug
--
Douglas E Powell
[email protected] <mailto:[email protected]>
http://www.linkedin.com/in/dougp01
<http://www.linkedin.com/in/dougp01>
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