why do we use star-delta starter. what is its need?

Answer Posted / sduhakar

We use star to delta bcoz it can reduce the motor current carrying capacity up to 1/3 times. For DOL stater it's starting current and running is same

Is This Answer Correct ?    19 Yes 11 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Proviiding the Dedicated N earth and individual Body Earths ,Finally these all looped /Now my Question :- will it not harm in case of Transformer Fault current flows in Dediacted N Earthing to Looped Body Earthing.

1740


battery capacity use of made?

2099


Can anyone explain me about the RLC based Impulse high voltage generator and how to and operation of Series resonant High voltage reactor...?

1422


distribution is maximum done by a)radial b)network c) parallel d)b & c

1498


EXPLAIN THE TERMS "INTEREST AND DEPRECIATION" AS APPLIED TO ECONOMICS OF POWER GENERATION.

1766






What is the difference between electronic regulator and ordinary electrical rheostat regulator for fans?

647


how the characterstics of control valve being done

1462


I want to put this query to SENIOR & EXPERIENCED ELECTRICAL ENGINEERS. 1)I want to know about the control circuit diagrams for control panels. I found it difficult to understand. Is there ant booklet through which we can learn the circuit diagrams? 2)I want to learn about conduiting, laying cables, preparing cable schedules and various techniques which is the part of building infrastucture(construction field). I don't have any experience in this area. I have experience in control panels only. that's why i am not getting any opening in building infrastucture (construction field).Can I get the job in this field as Trainee Engineer? How to enter this field? I need job in PUNE

1485


what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?

1478


What should be current in the Primary and secondary side of 1000KVA (11KV Supply)Transformer.?

630


how synchronous condenser is used in place of synchronous generator with out negotiating IEEE standards? Can i use 3 generators as synchronous generators and 2 generators as a synchronous condensers in an IEEE 14 bus system with out disturbing the standards?

1632


Greeting to all members, How to calculate spill current when we have different ratio CT and Class for REF(Low Imp) I have 500/1A 5P20 @line side n 400/1A CL.X @ Neutral.

2540


Why the symbol of register is "zig zag"

1134


how to setting Load amps tripping time and extra settings for load Transformer protection relay with RMU panel using C&S model relay..?

583


A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?

1514