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

pls tell me function of closing coil of A.C.B.

0 Answers  

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how does an centrifugal and screw type chiller will work. which chiller efficiency is high and why.

0 Answers   Hyundai,

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what is ideal transformer?

5 Answers  

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. What should be the minimum and maximum ohmic value for earthing?

1 Answers  

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difference b/w current and voltage relay?

1 Answers  

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while calculating the power absorbed by a resistor connected to the output of a half wave rectifier circuit should we use rms or average current? explain with reason.

1 Answers   Vedanta,

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explain with the help of loading capability curve,reactive power generation and absorption from synchronous generator?

0 Answers  

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Difference between on line capacitor and Station type capacitor.

1 Answers  

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what is difference between armoured cable and un armoured cable

2 Answers  

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What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.

0 Answers   Bhushan Power Steel,

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WHY PROTECTION CT IS USED NEXT TO METERING CT?

1 Answers  

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I did oil BDV test of 1600 KVA trafo 20KV/400V as per IEC 156. Result is 1) 58 KV 2) 58 KV 3)40 KV 4) 50 KV 5) 58 KV 6) 18 KV. Avr is 47 KV. Can we say oil is still ok even in the 6th test BDV is 18 KV ?

1 Answers  

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