WHY 6.6KV MOTORS ARE STAR CONNECTED AND WHY NOT DELTA CONNECTED,
- 15 Answers
- 30479 Views
- Bhel, I also Faced
- E-Mail Answers
Answer Posted / mayur
FOLLOWING MAY BE THE REASON.
1. REDUCE THE STARTING CURRENT
JUST LIKE STAR / DELTA STARTER USED FOR CERTAIN MOTORS TO REDUCE THE STARTING CURRENT. THE APPLIED VOLTAGE ACROSS THE WINDING IN CASE OF DELTA CONNECTED MOTOR IS 1.73 TIMES THE STAR CONNECTED MOTOR. HENCE IN STAR CONNECTED MOTOR THERE IS A REDUCED VOLTAGE STARTING. SUBSEQUENTLY CURRENT IS ALSO REDUCED, HOWEVER THERE IS A SMALL EFFECT ON THE STARTING TORQUE SINCE TORQUE IS PROPORTIONAL TO SQUARE OF THE CURRENT WHICH MAY BE ACCEPTABLE.
ALSO SINCE LESS VOLTAGE IS APPLIED, THE INSULATION REQUIRED FOR HT MOTORS MAY ALSO REDUCE LEADING TO COST SAVING.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
what is the working principle of energy saver control panel. please give the complete calculation & theory.
Is there any guideline say about display of earthing value near to earth pit
If a current -8+6sin6t is flowing three ammeter, one is a centre zero PMMC meter, one is true rms meter and one is moving iron meter. What are the reading of these three meter respectively?
What is dynamo function in DG sets and draw block diagram?
what is meant by 3rd hormonics ?
Write the analogous electrical elements in force voltage analogy for the elements of mechanical translational system.
why constant voltage transformer should be start without load? and if started then what will happen?
If there is major % of Voltage harmonics in the system, how can it be control or reduced?
List examples of current sources?
In a flange coupling, the flange bolts are designed for
I am going to appear RRB Sr. Section Engineer Exam, Electrical. Can you send me previous year questions of RRB Electrical engineer. specially Section Engineer questions. my email id is likerahulworld@gmail.com
does any one know where we can purchase insulation oil for high voltage oil filled cables
What is the difference between diesel generator engine with and without turbo charger with the same capacity?
What are the differences between single phase and three phase?
How to calulate Locked rotor amper(LRA) for compressor type motors?
