Answer / ipsa

to improve the starting tourqe and power factor.

Answer / jeevitha

To limit the starting current.During starting the current will be 4-5 times more than that of the total current hence in order to limit the starting current the DOL starter is used

Answer / elango .k

dol starter doesnt make any change in the starting torque.

Answer / yvb

Absolutely there is no specific advantage if you are a
small user. for heavy industries it is advantageous coz of
less parts(contactors & timers) comparitive to Y/D
starter.for industries that dip when we start a motor using
DOL will take their grid or CPP ,where as for small users
they may not have such facility. so the flour mill users
will use Y/D stater to avoid sudden load on supply lines.

How to calculate the average power factor in 3 phase unbalanced system

5 Answers   Bhel, MacLellan,

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what is basically a pulse transformer?

1 Answers  

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What is the HVDC Transmission System? What are the conditions applicable to lay an HVDC Line?

0 Answers  

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if a bird sits on the service wire it didn't get shock then why the human get shock when he touches it(assume that human is not on the ground and any object i.e. in space)?

5 Answers  

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what is specific gravity of a battery if specific gravity increase/decrease,what will happen to the voltage/current of the battery

5 Answers   NTPC,

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15 kva dg set single phase takes 63amp( approximate) while same rating 15kva three phase takes 35amp approximate. why ? and what will be per phase current for 15 kva

2 Answers   TVI,

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What is the technical formula to calculate the load taken by a motor in Amperes ?

2 Answers  

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please let me know , we have installed two separate motor for fire fighting system 1) 60 hp and 2) 15 hp the load is 74 AMPS and 20 AMPS then tell me the main power cable in Aluminum will be what thickness , the length is 225 mt from the main utility to fire pump house

1 Answers  

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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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Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.

0 Answers   HPCL,

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why voltage drop will occurs in 3 phase line?

12 Answers   ABB, Servo,

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I have a 25kVA three phase transformer on our property. Will this transformer be large enough to run a large home with swimming pool, spa, 2 off full size reverse cycle air conditioners to service a 100 square house (10,000 square feet or 930 square metres)and the general power consumption of this house without upgrading to a 63kVA transformer.

1 Answers  

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