This is a voltage drop question. A 500 MCM copper or 750 MCM aluminium conductor will limit the voltage drop to 3% or less when supplying 300 amps for 500 feet on a 240 volt system. Paralleling these conductors will allow the rating to be increased to 600 amps.
A 3 phase system needs only to use 3 or 4 conductors, as against 6 conductors if it were 3, single phase conductors The amount of copper used in a 3 phase is much less than what would be needed in a single phase system carrying the same current, this reduction in copper allows for weight reduction and cost savings. The power losses in a 3 phase system are much less than in a single phase system.
2 copper
Yes, there is a difference between single phase and three phase circuits.
AWG #3 copper.
working of single phase preventor
A 3 phase system needs only to use 3 or 4 conductors, as against 6 conductors if it were 3, single phase conductors The amount of copper used in a 3 phase is much less than what would be needed in a single phase system carrying the same current, this reduction in copper allows for weight reduction and cost savings. The power losses in a 3 phase system are much less than in a single phase system.
The phase diagram of a nickel-copper alloy with 50% copper and 50% nickel typically shows a single-phase solid solution at high temperatures, known as the liquidus region. As the temperature decreases, the alloy will undergo a phase transformation, forming a two-phase region consisting of a solid solution of nickel and copper (α phase) and a copper-rich phase (β phase) at lower temperatures. The boundary between the two-phase region and the single-phase region is known as the solidus line. At 1200°C, the alloy would likely be in the two-phase region.
Copper or aluminum wires.
The primary advantage is that, for a given load, a three-phase system requires less copper for tranmission/distribution than an equivalent single-phase system would require. Other advantages include the fact that three-phase machines are smaller than single-phase machines of similar rating.
2 copper
You can, but for a given load it's more economic, in terms of the amount of copper used, to use three-phase.
For a single phase 600 amp service, you would typically use 350 kcmil conductors. However, the specific size can depend on factors like voltage drop calculations, distance from the utility transformer, and ambient temperature. It's always recommended to consult with a qualified electrician or electrical engineer for a precise determination.
For a given load, a three-phase system uses less volume of copper (therefore is more economical) than a corresponding single-phase system, while supplying approximately-constant power. From the users' point of view, three-phase motors are self-starting and more compact than the equivalent single-phase motor.
There no brushes in an induction motor. The rotor is independent and is a short-circuited cage of parallel bars.
For a given load, a three-phase system requires around 75% of the volume of copper required by a corresponding single-phase system and, so, is more economical. A three-phase supply also delivers power more or less continuously, whereas a single-phase supply delivers power in pulses. Finally, three-phase motors are self-starting and physically smaller than single-phase machines of the same power rating.
copper losses are power losses due to flow of current in the wires or resistances,if the resistance is R, current is I then copper losses are I2R. for a 3-phase system; copper losses are same but for a single line, total losses are 3I2R.
1) less copper cross section to conduct current2) constant power to load3) constant rotating magnetic field4) Ideal for Direction Reversing5) Current is not zero at any constant..