I echo Tex's sentiments - that is outrageous! I've got a transformer under my UK desk powering my US printer, phone, answering machine.
Came with a Schuko plug on the end and a slide-switch to step down or up. It has big warnings in the instructions to check that the input voltage is correct but I suppose that theoretically this box is quite capable of offering 480V !
Re: Travel transformer#125028 02/03/0706:38 AM02/03/0706:38 AM
And just imagine when the weary, jet-lagged traveler arrives in Europe, accidentally connects the transformer the wrong way round, and then plugs his 120V appliance into 460 volts!
It has big warnings in the instructions to check that the input voltage is correct but I suppose that theoretically this box is quite capable of offering 480V
That won't happen. The transformer's core will saturate long before it can create 480v on what was to be the 240V winding. What will happen is that the transformer will draw way too much current from the power company and burn up or hopefully trip the branch circuit circuit breaker, when 240V is fed into the 120V winding. Which is still a very good reason to pay attention to what you're doing.
Good point. I hadn't thought about the core saturating. I wonder whether enough current would flow to trip the branch circuit breaker though. Used in a typicsl modern Continental European installation the outlet would be on a B-curve 16 or 20A MCB.
Saturation is a more gradual effect, it should be quite capable of producing 480V for some time, especially if it is substantially made (that manufacturer does). I doubt it has internal overtemp protection.
Even if it pulls more than twice its rated current on the primary (it does not look 3KVA continuous!), it is unlikely to ever trip a 13A fuse, still less a 32A MCB.