On Friday, 4 May 2018 16:09:21 UTC+1, GB wrote:
On 04/05/2018 16:02, wrote:
On Friday, 4 May 2018 15:46:37 UTC+1, ARW wrote:
Just fitted my first ever voltage optimiser.

Not much to it but I am puzzled.

I tapped of the 10% drop terminals. The incoming supply to the optimiser
is 251V and the outgoing load is 236V.

So where does the 10% come into this?


For a pure resistive load, the "power saving" will be the ratio of
the squares of the voltages, so it is fairly close to 10% for
those voltages.

Whether enough of the load is resistive and not constant power
(switch-mode) or thermostat controlled for this device to be
useful is another matter.

And bear in mind that the larger resistive loads may be things like
heaters, where there's no saving through reducing the power. The user
just has to wait longer for them to heat up.

Not quite snake oil, but probably vastly over-hyped.

I think that is what happened here, someone who knows little heard thata 10% saving could be made on electricity so opted for this type of thing and perhaps that's why we only get 210-220V suppy.





John