Hi Vic.
You wrote:
> Interesting question came up at the EU seminar yesterday in Toronto,
> where nobody really was able to give a definitive answer.
>
> Questions comes in an EU related version and in a general version.
>
> What are the regulatory requirements for a device that has a
> "rated voltage" below the limits of the LVD, but has inside
> voltages that are:
> (a) within the scope of the LVD
> (b) higher than the scope of the LVD
>
> What are the requirements for a device that has a "rated voltage"
> below the limits of IEC-950, bust has inside voltages that are:
> (a) within the scope of IEC-950
> (b) higher than the scope of IEC-950
>
> We all knew the common-sense answer, but common sense is nothing
> than the sum total of what you've learned before age 18 (I believe).
>
> Off for San Jose now. Tata
>
>
> Vic Boersma
I asked this question of a 'Learned Body' at a Symposium, but couched
in terms of a portable television, but could easily refer to a
portable CRT PC (Osborne 1?) if it ran from a battery only.
- The TV runs off 12V d.c. (outside LVD)
- To run it from 110V/230V you use the supplied in-line 12V psu.
- Internally the TV generates
400V around the scan coils (within LVD)
20kV pda (outside LVD)
The reply I got, which seemed quite sensible, is that the LVD is
aimed deliberately at power distribution voltages, and that if the
equipment is not connected to power distribution then it was not the
intention of the Authors of the LVD to include it.
Therefore, the TV need not comply.
If however, the 12V psu was internal to the TV, then there is a
connection to the power distribution (i.e. mains inside), and the LVD does
apply.
Throw that one into the pit to see if it floats...
Hope San Jose was nice.
Chris Dupres
EMC Specialist. VG Microtech.
[email protected]
tel +44 (0) 1825 761077
fax +44 (0) 1825 768343
'Opinions expressed are personal, not necessarily Corporate'
