Firstly, it is a three-phase system, the power is divided between them equally. This has advantages and disadvantages.
In a system which is balanced, you should calculate properly how you share the power, so the generator always works at an optimum level of performance. If there is a gap, it could cause serious problems and faults.
Moreover, this makes the difference in terms of the utilisation of the energy and power offered. It makes them the most suitable machines for the industrial sector and for installations that require high power, or that have significant energy demands.