[OpenTRV-dev] OT: Voltage drops

[Bo Herrmannsen]

hmm... i think you are right.. its the phase shift part that will benefit
most from what i'm doing


i will also agree to that 0-100A is rather a hughe step... for me thats far
beyound what i need, i can draw a max of 16A amps on each of the 3phases i
got in the fuse box

/bo


2013/6/11 Kevin Wood <EMAIL ADDRESS HIDDEN>

> Indeed. Looking at the openenergy design, it's the current monitoring side
> that would be the largest source of error due to the fact that it lacks
> resolution, especially at low power levels. A couple of current ranges
> rather than trying to do 0-100A in one range would help there (I think
> someone's proposed a design to do just that somewhere).
>
> Measuring mains voltage through an off-the-shelf step-down transformer
> with a purely resistive load takes us back into the comfort zone of most
> constructors as far as safety goes and I can't believe it introduces much
> of an error if calibrated. Maybe a bit of phase shift and flattening of
> the top of the waveform if the transformer is a bit close to saturation?..
> Not sure. Will have to have a play with that.
>
> Kevin
>
> > I think the question here is what are the benefits of 'almost error
> > free' mains voltage measurements ?
> >
> > Then compare to the risks, biggest being death, or fire.
> >
> > Stuart
> > _______________________________________________
> > OpenTRV-dev mailing list
> > EMAIL ADDRESS HIDDEN
> > http://lists.opentrv.org.uk/listinfo/opentrv-dev
> >
>
>
> _______________________________________________
> OpenTRV-dev mailing list
> EMAIL ADDRESS HIDDEN
> http://lists.opentrv.org.uk/listinfo/opentrv-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opentrv.org.uk/pipermail/opentrv-dev/attachments/20130611/d6a84a83/attachment.html>