Yes, you can use a 230 volt device on a 240 volt supply.
Yes, electronic products need to work over a range of voltages as the mains is not maintained at exactly 240V or 230V. Typically they have a range of at least 10% and normally much more. So it should work down to at least 216V.
Do you have a dual capacitor that starts both the compressor and the fan motor? You need 230V to power the compressor. You should have one wire from the capacitor going from the start terminal on the compressor and one going from the common terminal to common on the capacitor.
India's voltage is 230V so you need one that will convert from that to US standard.
A: Nobody should give you an answer for the simple fact there is no mention of current requirement. Let me try this minimum need is a reverse breakdown voltage of 648.60 volts. for 1 amp try 1n4007.
Electronic technician will convert in no time. You need 240v power transformer in place of same wattage 120V. Super easy.
I depends on what you are connecting to it but you only need 1 of the phases providing you can get to a neutral
You'll need to contact an electrician to modify the circuitry of your home.For some low power devices, you can purchase a transformer that will convert to 240V, but if you're using higher current you'll need to run a 240V circuit back to the breaker panel.Always seek the assistance of a qualified electrician for these types of modifications.
Your compressor is a dual voltage compressor. The original installer followed the instructions to switch it (probably internally) to the 230 volt setting or to internally wire it for that voltage. The label or information plate on the unit may only indicate the higher voltage rating. You don't have to do anything.
A European hairdryer operates on 230V. US power is 110V. The hairdryer will need a high power converter that will be fairly expensive. (110V input to 240V output rated at about 800W) It will be less expensive to buy a new one at Walmart when you get to the US than it will be to buy a converter for the European one.
The power adapter need 230v, 50Hz supply
In the US, both 120v and 240v will be needed for your home, as different appliances need different voltages. Your TV needs 120V, while your electric dryer and stove will need a 120V/240V supply. If you have an electric water heater, or central AC unit, they will need a 240V supply.
Using a box that is hire voltage than what you need can cause a short, and even a fire. So using a 240V box, when all you need is a 110v receptacle, wouldn't be a good idea.