Whats the difference between three phase and single phase?

Answers were Sorted based on User's Feedback



Whats the difference between three phase and single phase?..

Answer / amjith meeras

in three phase system we can use it in two modes one is delta connection and other is star connection,
in delta connection we will get only phase to phase voltage, in india its 415vtg its because of there was no neutral point in delta connection.
but in star connected it has one neutral point and 3phases in R-Y-B sequence so we will get phase to neutral voltage and phase to phase voltage from it.
for ex: the transformer primary was connected with 3phase 3core cable but its secondary side has one neutral and three phase it connected with 4core cable.
all machine other than motor wants neutral for it work.

Is This Answer Correct ?    3 Yes 0 No

Whats the difference between three phase and single phase?..

Answer / naveen kumar k s

in single phase system in our india 230v &three phase
system 415V BECAUSE IN *SINGLE PHASE WE CAN USE NEUTRAL
POINT THIS IS THE RETURN PATH OF THE CURRENT *THREE PHASE
SYSTEM R-Y-B WE CAN MEASUre THE Vg Wrt R-Y
Y-B
B-Y BUT ANY WAY WE
CAN'T MEASURE WITH NEUTRALL(IN 3Ph IT SHOULD REEQUIRE TO
SHOWS 460Vg BUT IT CAN'T SHOW BECAUSE RMS VALUE OF AC)
THAT'S WHY THE RMS VALUE OF P-N Vg & P-P Vg IS DIFFERENT
BECAUSSE OF THIS REASON OUR MEASURING Vg DIFFERENT

Is This Answer Correct ?    2 Yes 1 No

Whats the difference between three phase and single phase?..

Answer / ram43

three phase (RYB)-- 415 voltage
single phase (PN)---- 230 voltage used...

Is This Answer Correct ?    0 Yes 0 No

Whats the difference between three phase and single phase?..

Answer / arikrishnan

three phase system;
we can get tow types of voltage single phase and 3 phase.three phase motor has self starting.it has constant torque.fault finding is very easy.efficiency is high. we can get large capacity of the motor.it's output is high. transmission cost is low.three phase alternator parallel operation is easy.
single phase system;
we can get only one type of voltage.it has no self starting.it's torque is variable.fault finding is difficult. efficiency is low.we can get only low capacity motor only 1/4,1/2,1,1.5hp. its out put is low. transmission cost is high.we can't parallel with single phase alternator.

Is This Answer Correct ?    0 Yes 3 No

Post New Answer

More Electrical Engineering Interview Questions

what is the relation between knowing of the distance between power transformer and the capacitor feeder in case of parallel operation

0 Answers  


What is the size of a 60 watt and 80 watt tubelight?

0 Answers  


who invented electricity?

20 Answers   L&T,


How would u describe the function of a generator & motor?

5 Answers  


ac and dc motor advandtage,disadvantage,aplication

2 Answers   Apollo,






Why transformer rating in KVA? and Generator also?

6 Answers   Bhel, IEEE, Toyo Denki, Toyo Engineering,


what is method of dc current measurement

5 Answers  


a transformer runs by electro-induction principle like all motors.then why dosen't it rotate just like any other motor

2 Answers  


What is the function of PMG in DG sets & how it works??????????

2 Answers  


Why the high starting current does not harm the low capacity induction motor?

1 Answers  


If we have 11 kv RYB Phase single core cable near about. Then wht effect and losses

0 Answers   Kirloskar,


what are the points to be consider for MCB(miniature circuit breaker selection?

3 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5084)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16631)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1094)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)