[OpenTRV-dev] OT: Voltage drops

[Bo Herrmannsen]

yep, my learning curce is just somewhat rather like climbing a vertical
wall (sometimes), but i will eyeball the schematics and hold it against
what you have just told.... must get it at some point :-)

/bo


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

> Yes, this is also fair comment. Making this circuit safely relies on an
> understanding of *exactly* how it works, as the author goes to some
> lengths to point out.
>
> Kevin
>
> > If you don't know the answer to particularly the first of those two
> > questions then you shouldn't be tackling a project involving direct
> > connection to mains.
> >
> > Mike
> >
> > ----------------original message-----------------
> > From: "Bo Herrmannsen" EMAIL ADDRESS HIDDEN
> > To: "Closed list for developer discussions"
> > EMAIL ADDRESS HIDDEN
> > Date: Tue, 11 Jun 2013 14:11:05 +0200
> > ----------------------------------------------------------
> >
> >>
> >>I'm working a bit again on a circuit that allows safe and "almost" error
> >> free
> >>messurement on mains voltage (search givmon on openenergy)
> >>
> >>i have all the bits reasonble placed and observed the 3mm creepage
> >> between mounting
> >>holes etc...
> >>
> >>but i need to calc what voltages there are present where to make 100%
> >> sure
> >>
> >>of course i have googled but i cant find an easy to understand answer for
> >> these 2 q's:
> >>
> >>
> >>adding 3 2.2Mohm in series to both the neutral and line wires.. what
> >> would the drop be?
> >>
> >>and what would the drop be across a 0.47uF capacitor? the mains are
> >> connected via that to
> >>a bridge recitifier and need to know what voltages i can expect arround
> >> those
> >>
> >>/bo
> >>
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> >>
> >>
> > --
> >
> >
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