|> In a previous thread a reference was made to an expert recommendation
|> that surge suppressors have their clamping voltage doubled from 330V
|> to 660V for 120VAC suppressors.
|> Originally, I thought that was a bad idea. But now I think maybe
|> that will be useful. How I came to that conclusion was finding that
|> suppressors were not readily available for 240VAC power systems.
|> With such a change in the clamping voltage, I could use these more
|> common suppressors as part of the changeover from 120V to 240V for my
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| The clamping voltage statement doesn't sound right. I'd go back and
| reread the information and pay particular attention to the knee voltage
| and the current rank just prior to it. I'm not saying it's a bad idea;
| just that it might have a lot of leakage on 240 that surpasses the
| component's temp ratings.
If you designed and constructed a real 240V protector, would you not make
it have twice the clamping level?
| You don't give enough info on how you plan to use these, but I do know
| that the UK style 230Vac 50Hz does have accomodating surge suppressors.
| Their grid is configured differently than here in the US where I am of
I would use it here in the US on the US style 240V system which is 120V to
ground on each of two hot wires in opposing polarity (180 degrees in the
case of genuine 240V single phase).
I have considered using a German power strip, and just make my computer
wiring all based on the Schuko. The Schuko is unpolarized and symmetric,
even though the electrical system it is based on is 230V L-N. But they
require devices to be safe when plugged in either way. So these devices
should be able to handle 230V relative to ground on either conductor, as
we as between conductors.
The change of clamping voltage from 330V to 660V would means I might be able
to find devices with protective components that could handle 240V L-L *AND*
be able to support replacing NEMA 5-15R outlets with NEMA 6-15R outlets. I
would prefer to use the NEMA 6-15's over the Schuko.
Alternatively to the Schuko, which is more common, I might use the Italian
Most of my "wall wart" power supplies are rated for 100-240 volts. But they
all have NEMA 1-15P on them. So I'll still need to either put 240V on a
NEMA 5-15R or just run these on 120V.
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