I would like to know more about the application, but here goes. You can use a standard boost/buck transformer of 16/32 volts wired for buck of 16 volts and bring it to 239 vac. However depending on the application you may not have a problem with the voltage of 255 vac. You may attache a load to the system and see the voltage fall into the area of 240 vac once you are running. Saw it happen many times in practice.
You can buy a 1 to 1 (or 1:1) multi-tap isolation transformer sized to handle 260v and whatever volt-amps you intend to run. It will come pre-wired to give you the same output voltage as you supply, 260v in your case. But the multi-taps allow you to adjust the output voltage up or down depending on your needs. Choose the taps that give you a voltage as close to 240v as possible.
This is not a do-it-yourself project. The primary and/or secondary must be protected by over-current devices and it must be properly grounded.
<><><>
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
a stepdown transformer is used to reduce the voltage and limit the available amperage
Use a step-down transformer with a ratio of 2:1
step down transformer
Volts isn't power. Volts times amps is power, also known as watts. Thus 480 volts at 2 amps consumes 960 watts, which is the same power usage of 240 volts at 4 amps or 120 volts at 8 Amps.
The formula you are looking for is Watts = Amps x Volts. Amps = Watts/Volts.
For alternating current, and assuming the supply transformer is properly grounded, you will have 240 volts to ground. 480 volts; single phase will have Line1 and Line2, both with 240 to ground and 480 across both Lines : three phase will have Line1, Line2, and Line3, all will have 240 to ground, and 480 across any two Lines. Same is true for 240 volt service, 120 to ground and 240 across. 120 volt service is 240 volt service using ground as neutral.
P = E x I P = 240 x 2 P = 480 Watts
Absolutely not!! 277 volts is developed from a 480 volt power supply employing 1 conductor and a neutral. 240 volt power comprises two hot conductors and NO neutral.
Volts isn't power. Volts times amps is power, also known as watts. Thus 480 volts at 2 amps consumes 960 watts, which is the same power usage of 240 volts at 4 amps or 120 volts at 8 Amps.
It is simply a product of standardization.
The formula you are looking for is Watts = Amps x Volts. Amps = Watts/Volts.
240/220 480 volts 3 phase
240, 480, 720 and so on.
For alternating current, and assuming the supply transformer is properly grounded, you will have 240 volts to ground. 480 volts; single phase will have Line1 and Line2, both with 240 to ground and 480 across both Lines : three phase will have Line1, Line2, and Line3, all will have 240 to ground, and 480 across any two Lines. Same is true for 240 volt service, 120 to ground and 240 across. 120 volt service is 240 volt service using ground as neutral.
480
P = E x I P = 240 x 2 P = 480 Watts
These voltages are both wye connection three phase voltages. The voltage difference comes from the primary three phase voltage supplies. 277 volts is obtained from 277 x 1.73 = 480 and 240 volts is obtained from 240 x 1.73 = 415. 480/277 volts is a common three phase American voltage. 415/240 volts is a European voltage. In Canada a common three phase voltage is 347/600. The 240 volts could also be a single phase voltage in North America derived from a split phase secondary on a distribution transformer that supplies 120/240 volts to homes.
Absolutely not!! 277 volts is developed from a 480 volt power supply employing 1 conductor and a neutral. 240 volt power comprises two hot conductors and NO neutral.
240, 480, 720, 960, 1200, 1440 +240 . . .
240