It depends on your definition of efficiency. 480 can certainly push more power than 208 through the same size conductors, but it would not be efficient to wire a motor for 480 when 208 was all that was needed.
you need a step up transformer
In the United States, 208v can be either. It is generally the voltage supplied by a 120/208v 3 phase system. However, using 2 legs of this 3 phase system is called single phase. I won't go into the reasons for that but just understand that 208v can be either single phase or 3 phase.
Yes by using a 3-phase transformer. The size depends on how much power has to be converted.
Two scenarios are that the motor could be a three phase motor. These three phase motors are manufactured in smaller sizes. The other scenario is that the motor is a 208/220 volt single phase motor. It will operate on 208 volts by taking two legs of the three phase supply for its operation.
The voltage you are referring to is a 'line-to-line' voltage ('line voltage'), as there is no such thing as a 'phase-to-phase' voltage.480 volts. In real life, the voltage will vary slightly by up to 3% (14 V) on a properly sized circuit. Line to neutral will measure 277 volts, plus or minus 3%.
you need a step up transformer
A source of 208 volts can be obtained from any two legs of a three phase four wire 208 volt system. The two legs are classed as single phase 208 volts. The lead tags can be L1-L2, L2-L3, or L3-L1 all of which will give you 208 volts. Any of these lead tags to the grounded star point (wye) will give you 120 volts.
That is 20.8 kVa but a 208 v single phase supply is very rare. 208 v is usually three-phase, with 120v between neutral and the live wires.
208 is a three phase wye connection voltage. To obtain the each individual coil voltage the 208 is divided by 1.73 which equals to 120 volts. Hence you have 3 phase 208 voltage on the phase legs and 120 volts to the wye point which is grounded. This same formula is used on any 3 phase system. 600/347, 480/277, 208/120.
You can buy a converter. Here is one example of many available on the web.Phase-A-Matic PAM-300HD Phase Converter, Static, 1-3 HPPhase Converter, Static, Input Voltage 208-242, Output Voltage 208-242, Input Phase AC 1, Output Phase AC 3, Input (Amps) 15, Output Amps 9.6 ...
I have 12 amps 208/3/60 what would the amps be @ 440/3
In the United States, 208v can be either. It is generally the voltage supplied by a 120/208v 3 phase system. However, using 2 legs of this 3 phase system is called single phase. I won't go into the reasons for that but just understand that 208v can be either single phase or 3 phase.
Single phase or three phase? 120/208 would be measured hot to ground for 120 and hot to hot (phase to phase) for the 208 reading. Any hot to ground will read 120 and any two phases together will read 208.
A device that operates on 208 volts single phase power requires a power source that provides 208 volts of electricity in a single phase. It is important to ensure that the device is compatible with this specific voltage to prevent damage or malfunction.
If you mean by a converter, a transformer, to change the voltages then yes 240 volts can be transformed with a step down transformer from 240 volts to 208 volts in a single phase system. To answer the question single phase can not be converted to three phase without additional expensive equipment. One piece of equipment that will do it is a variable frequency drive. Another piece of equipment is a roto-phase. Either of these pieces of equipment would probably cost more than the grill you are trying to supply a voltage to.
Yes by using a 3-phase transformer. The size depends on how much power has to be converted.
Answer for USA, Canada and countries running a 60 Hz supply service.To answer the first part of the question. No you can not convert 120 volts single phase into 208 volts 3 phase. In fact it is the other way around, the 120 volts is the line to ground (neutral) of a three phase 208 volt system.The second part of the question is dependant on there being a three phase 208 volt system already installed. To obtain 40 amps per phase would require a three pole breaker to be installed in a 120/208 three phase distribution panel.The distribution panel would most likely be in the 100 to 200 amp capacity range. This kind of installation would definitely have to be installed by an electrical contractor as inspections and permits would have to be taken out for the project.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 JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.