Question about Device voltage

[michihenning]

@MichaelF

I really wouldn’t recommend trying this for a SV cooker

More info here:

Bought a 120V. We use 240V back here.

I don’t buy it. I don’t see how a transformer could fail open, seeing that there is no galvanic connection between the primary and secondary coil. Moreover, a step-up/step-down transformer will have a fuse in it that will prevent excess current flow so, even if it were to fail open, the fuse would blow. If there is a short against the chassis of the transformer (primary or secondary side), an RCD (residual current device, aka earth leakage detector) will trip instantly. (Most households will ha…

Bought a 120V. We use 240V back here.

Something like this will do the job: https://www.wallcann.com.au/1500w-step-down-transformer/#productInfoTab1 Note that these things are big, heavy, and expensive. Also note that you need something that will handle 800/900 W for extended periods. A 1000 W transformer might (just) be sufficient, but would struggle during the initial heating period, possibly getting too hot and turning itself off.

A transformer will work fine as long as it is rated for the load. But it’s easier and cheaper to buy a device that matches your mains voltage.