In article ,
GB writes:
On 04/05/2018 16:27, Harry Bloomfield wrote:
Brian Gaff explained :
I'm not sure exactly what you are doing here?

It is one of those silly scam gadgets, which claims to save on your
electricity bill. They reduce the voltage by 10% and claim it will save
you 10% on your bill, which is absolute balony. Heating loads will just
take that 10% longer, motors produce less power output, incandescent
lights will be much less than 10% dimmer, LED's and CFL's will simply
draw more current, to produce the same amount of light, or more lights
will be needed to make up for the darkness.

The unit itself, will also waste some power in heat produced.

Yes, they were pretty much discredited when one of the
manufacturers tried to get them made mandatory in homes.

I think fridge motors might operate at the lower voltage and draw less
power. But, I'd want a separate circuit for the kettle that has +10%
voltage on it.

Fridge motors are already operating with barely enough torque
to start them. Reducing the voltage runs the risk of burning
them out with a locked rotor current. (They do have protection
against this, but eventually your luck may run out.)

More intelligent compressor controllers reduce the power once
started, but I'm not sure how widespread they are in domestic
fridges yet. At one point, there were plug-in modules which
did this for fridge/freezers, but I haven't seen them for years
now, which may mean they were worse than just a bad idea.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]