Changeover from D.C to A.C  

In the latter half of eighties, in nineteenth century, it was planned to have a power system with 3-phase, 50 Hz A.C generation, with transmission and distribution networks. Once a.c system was accepted, transmission of large power (MW) at higher transmission voltage becomes realism by using transformers. The level of voltage could be changed virtually to any other preferred level with transformers – that was up till now impossible with D.C system. Nicola Tesla recommended that constructional simpler electrical motors (i.e., induction motors, with no the complexity of commutator segments of D.C motors) operating from 3-phase a.c supply could be manufactured. However, his arguments in favor of A.C supply system possess the debate on switching over from D.C to A.C system.