Answer / ashna & anju

in star conection ,phase voltage is lesser than line
voltage and induced emf in the phase winding of an
alternator is directly propotional to number of turns,a
star connected alternator will require less number of turns
than a delta connected one for the same line voltage.

Answer / $$$

TTT
IT IS BECAUSE THIRD HARMONICS CAN BE ELIMINATED USING STAR
CONNECTION AND DISTRIBUTED WINDINGS IN 3-PH ALTERNATORS..

Answer / ajay

IT IS BECAUSE THIRD HARMONICS CAN BE ELIMINATED USING STAR
CONNECTION AND DISTRIBUTED WINDINGS IN 3-PH ALTERNATORS..

Answer / meenakshi

i feel the answer given by $$$ and ajay is correct.in delta
its closed loop, so it allows the parasitic current to
circulate in the loop which is an undesirable one.

Answer / gowrisankar

this above ans is correct

Answer / muhammed konikkal

out put is required in AC form with neutral.Neutral can be taken only from Star connection. We can take out put single phase or three phase depending our load.

Answer / manish kumar

in a star connection, phase voltage Vph = VL/ (3)^1/2.
1--Since the induced emf in the primary winding of an alternator is directly proportional to the number of turns, a star connected alternator will require less number of turns than a delta connected alternator for the same voltage.

2-- it also requires less insulation bcz its phase is less.

3-- it also help to reduce third harmonic ...

Answer / sudheer

induce emf is proportional to turns so for same line voltage no of turns required is less hence insulation required is less and for protectio purpose we require ground so ground provided in case of star only

Answer / binod pradhan

2-in star connection the phase voltage is low than the line voltage,so it required less no of turn. 3-low insulation required as phase voltage is low. 4-1 neutral point available in star connection. 5-unbalance current flowing in the three phase circuit, neutral is having a vital role.It will take the unbalance current through to the ground.

Answer / mahfooz alam

In Star connection the Line Voltage is 1.732 times the phase voltage. As a result of which we can have the higher voltage in star connection when compared to the delta connection. Thus, to have more output voltage Star connected Alternator are used.

how to interlock 3 nos MCCBs using under voltage coil. please provide me circuit diagram?

0 Answers   Honeywell,

Why in Digital Megger for finding Insulation resistance,-ve is applied to core or conductor and +ve is applied to ground.

1 Answers   ACC,

What is the life of MCCB

1 Answers   Siemens,

Is Neutral earthing necessary for single phase system or Genset? if yes or no then why?

1 Answers  

what size of copper busbar use for 11kv 630A

3 Answers   ABB,

Where there is voltage,there must be current.Is this right or wrong??

10 Answers  

How time response of the system is divided?

0 Answers  

How to control motor gearbox speed and friquency? If length of cable and dia given, how to measure the voltage drop?

0 Answers  

i have ht transformer of 142 kva with air cooled facility,having secondary voltage 7850volt, and secondary connected full way bridge rectifier .i faced the problem repeatedly that transformer one coil and rectifier diode of two phase was burnt two times. i checked all the secondary ckt. no any short ckt found,then what will be the cause side

2 Answers   Modern Terry Towels,

how ti maintain the power factor in power generation

1 Answers  

What is the gain of 1-s/1=s at 1 rad/sec?

3 Answers   NPCIL,

why bucholtz relay placed inclined in transformer?

1 Answers