My question is " Can 110V/60Hz rated appliance run in 220V/50hz without any adaptor?".
--- I asked it because i run a 110V rated appliance in 220V supply, and it run properly, without causing any damage!!!, i know there's Max Power Rating exists, but still is it OK ---
I feel Step Down transformer should be used in this case, atleast if its not designed for 110 V & 220 V:
What may happen at the extreme? Would it catch Fire? :E
It's a LEG Massager , used to relive the leg pain,
Meant to Use 1hr/30 min daily, but i observed that the system got warmed-up, said to be normal for that instrument.
I have had a microwave oven and a light timer that was 110v. It was used with an adapter / step down transformer on 220v 50Hz and the time was messed up. Eventually most 110v equipments that I had died sooner than expected.
I have had a microwave oven and a light timer that was 110v. It was used with an adapter / step down transformer on 220v 50Hz and the time was messed up. Eventually most 110v equipments that I had died sooner than expected.
My idea was to put a diode in series with it because it will reduce the RMS voltage.
Unfortunately, I forgot that it would only reduce the RMS voltage to 70.7% not 50% which is what I thought.
EDIT:
The diode would only work for resistive loads anyway, say the mains is 240V and you have a heater rated at 170V, it would work but it would destroy a heater designed to run on 120V.
hmmm...
It's over now, a cordless phone from US with adapter rated for 110V input was used at 220V AC.
Then, the adapter had burning smell. then i changed it to 220V rated adapter.The instrument(phone) gets switched ON, but now i cant recieve or make calls from it.(GOTIT SPOILT) , rating is a commonsense, which one of my friend didnt believe in.
...and then same-thing happened to the above mentioned 'LEG Massager'
Of course there are exceptions, it's the same with some digital clocks too and it's not much of a problem if the user is aware that it's running fast or slow, but the vast majority of appliances don't use clocks synchronised to the mains so it isn't an issue.