Answer / dinesh

As we know that the starting current of motor is high due
to absence of back EMF and low resistance of rotor. In
order to cotrol the starting current we use star coneection
for few time and than your mtotr runs in delta.

As we know that stating torque of induction motor is
directly proportional to square of supply voltage so your
voltage value becomes supply voltage/1.73 and stating
current is limited in star connection and then back EMF
comes into picture

Answer / mohamed ghanem

to limit the starting current

Answer / arul

To reduced that starting current. ( Or) to limit the starting current

Answer / kyle

It's commonly called a, "Soft start." Keeps from jolting the motor/pump/shaft.

can you use 400 volt 3 phase and neutral and earth equipment on 440 3 phase and earth supply safely and if so how?

2 Answers   Maersk,

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Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?

0 Answers  

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Why we use 2core cable for Dc motor.Can I use 3core?

5 Answers   JK Paper, Maharaja Whiteline,

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if we put a energy meter in 500 kvar capacitor bank ,then how much units show in energy meter per day.

2 Answers  

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What will happen when we will connect lamp in between phase and earth. 

3 Answers  

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Is there thumb rule to calculate how many Insulators to be used for Transmission line of different volatges

3 Answers   CS,

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Do u know any one? how to find out in motor rated amps? formula?

0 Answers   Banking, ET,

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what is the meaning of knee point in current transformer and how to calculate?

2 Answers  

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we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

0 Answers   RYK Mills,

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what is the function of generator exciter

11 Answers   NTPC,

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how the synchronizing is obtained at bus couplers in grid substation? (because there we cannot change the frequency in one of transmission lines like in generator synchronization)

0 Answers  

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What is BUCKBOOST TRANSFORMER and Operation of Buckboost transformer?

4 Answers   Voltamp,

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