Answer / raghavendra

basically power is required for each and every appliance we use like motors ,fans,ac,tv's,fridges etc.for each and every load there should be different type of supply . the three phase supply increases the efficiency of single phase supply by 50 percentage .but further increase in phase like six phase increases the efficiency by only 7 percent only and also leading to more complications on the generator side , and further increase in phases also leads to same case increasing the complexity on generator . so 3 phase supply includes 3 phase double circuit supply ,3 phased 3 circuit supply and so on........................

Answer / nilamani umashankar jena

IN THREE PHASE POWER THE VOLTAGE REMAINS CONSTANT SO THE
EFFICIENCY IS MORE

Answer / nilamani umashankar jena

IN 3 PHASE POWER SYSTEEM THE VOLTAGE REMAINS CONSTANT AND
WE GET QUALITY POWER

Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . please reply..............

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