[Power] Haiti power questions

[Richard A. Smith]

On 12/02/2010 03:04 PM, forster at ozonline.com.au wrote:
>
>> That's what I would have expected but we have received reports back
>> of XO's burning out generators.  I have very little more data than
>> "we ran it on a generator and it burned up."
>>
> It sounds like it may be harmonics - non sinusoidal current.
>
> I have a green 1.0 wallwart and a white 1.5 wallwart, I can measure
> their current waveform. But what we wont have is data on the
> generators on their tolerance to harmonics.

That sounds like a good first step.  That gives you the data and 
questions that you can ask or look for in the specifications.   How does 
that scale when you have 100 XO's on the wire?

> Power factor, as in phase shift, is probably not a problem. You can
> correct it with capacitors as said. (But thats how I blew up the MOVs
> with my generator, trying to run an oversized load and adding
> capacitors). Capacitors may also help on harmonics a bit too because
> they are also low pass filters
>
> Tony


-- 
Richard A. Smith  <richard at laptop.org>
One Laptop per Child