Answer / pradeep kumar patel

yes, bcz 1-starting current is (5-6 times)greater than
supply current .2-starting toque is (1.1 times) greater
than normal torque.

Answer / limna

since an induction motor is started on no load,it has a high starting torque.therefore they are switched on by providing high resistance using a starter.and once the motor has reached its rated speed the starter resistance is slowly cut out.

Answer / anilrajkumar

to limit the starting current and thereby reducing the starting torque,preventing the damage to the motor due to high current

Answer / saumil patel

i=(V-Eb)\r
so at starting in induction motor back emf is 0.so current will be more than 5 times of full load current,so it need starter for safely starting....

Answer / avvkishore

safety and protection purpose

HOW TO CALCULATE THE WIRE SIZE FOR THE GIVEN LOAD?

5 Answers  

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When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

0 Answers  

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starting torque is increased and current is decreased by using external resistance in a slip ring induction motor. How??

3 Answers  

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what is conductor copnstant of ab cable

0 Answers  

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i am electrical and elctronics engg passed out in 2009 want to attend for reliance placements.plz send me apttitude ,technical and hr question answers to my mail plz. my mail id-kat.bindas@gmail.com

0 Answers  

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In a d.c current, the power is the product of voltage and current. This relationship does not always apply to effective(r.m.s) values in an a.c circuit. Explain the reason for this.

2 Answers  

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What is mean by staling?

2 Answers   UPPCL,

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why ac generator ratings in kva only why not kw ????????????? ?

7 Answers  

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Here iam a question with SYNCHRONIZATION PANNEL related issue, as i want to design a SYNC.pannel board iam giving the 2 nos of 1MVA Generators to sync pannel , then what wil be the out put of the sync pannel, whether it wil be one cable coems from the sync panel or two cables.. as iam using two transformers to meet my load demand, so pls clear me whether two cables comes from sync panel to connect to transformers or only one cable

3 Answers  

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instead of neutral can we use earth/ground to flow the current in the circuit

2 Answers   Infosys,

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Can anyone explain the power flow in flouresent lamps (tube lights) .What are the functions of Starter & choke used there?

1 Answers  

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iam preparing for rrb section engineer post in electrical branch.suggest the right textbook for my reference.fromwhere i will get the previous q.papers?

0 Answers   RRB,

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