The people to ask is the manufactor of the sewing machine. I am sure they have a site....pkazsr
A welder requires high current at the expense of voltage, The transformer reduces the voltage allowing a higher current to operate the welsing machine.
A transformer will operate with a voltage regulation of zero when it is not supplying a load.
transformer will work on ac
Transformer
You cannot 'change' the 'rated power' of a transformer except by changing the transformer for another one. You can, though, operate the transformer below its rated power or, for short periods of time, operate the transformer aboveits rated power.
What is needed to operate a machine is energy.
If its a triangular wave, its not DC, its AC, its just not sinusoidal. Can a transformer operate on triangular AC? Yes, but not as efficiently as on sinusoidal AC.
You cannot connect directly unless the espresso machine specifies it can operate at the lower voltage. If the machine were to operate you would be doubling the current. If you installed a transformer or converter to up the voltage you would have to ensure that you didn't overload the 110 volt circuit. Best bet is to have an electrician install a dedicated 220 volt circuit.
A transformer will operate with a voltage regulation of zero when it is not supplying a load.
an REF relay (restricted earth fault) is used to provide ground fault protection for a transformer. Its' operation is limited by CTs starred towards the transformer (usually on the transformer bushings or in breakers used to isolate the transformer), so it will only operate for transformer related faults. Because of this, it can be set to operate very quickly.
in transformers for instance a stepup transformer does exactly that, steps up the voltageAND/OR theamperage and a step down transformer reduces the same. if you have a machine that operates on say 120 volts alternating current single phase and your building or power supply in your buildingis set up for or delivers480 volts alternating current-three phase you will need a step down transformer to operate the machine.
To operate a sewing machine, you will need a place to set the machine up, thread, bobbins and a needle for your machine and fabric type.