star delta connection used in reduce the starting current
at 3 times . how its reduce the current please explian .

Answer Posted / m.varadarajan

when higher hp motor starts with high current, to reduce
the starting current we are using this connection,it will
reduce 1/root3 times of full load current, after motor
reaches of the rated speed, delta connection applied.this
time full voltage applied to winding and motor run smoothly.

Is This Answer Correct ?    17 Yes 23 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Why let through energy not considered for ACB breaker while cable sizing?

1974


What is the formula to calculate the size of Aluminium and copper cable?

1571


What is difference between isolator and circuit breaker?

721


how to store the thunder power?

3905


Why back emf used for a dc motor? Highlight its significance.

793






what is the affect of earth's magnetic field on the frequency used in aircraft???

1627


Diagram and details of polarity test for Current Transformer 11kv 400/200/100/1A

2671


What is Icu and Ics and what is difference b/w them. please tell me how to calculate a size of a copper bar for a system or a breaker... reply on... king.arish@gmail.com would be waiting for a logical answer.

2050


how many Classification of fire extinguisher

1758


what is thermal resistance of PVC Cable.

1433


What is the requirement of grounding the neutral of single phase generators on load? If the neutral is not grounded, what will be the effect?

1731


I am having dual speed motor of cromton greaves make of 3.7 KW -1400 rpm and 5 KW - 900 rpm. Please let me know groups and winding connction for rewinding purpose.

1599


my diploma certificate in my higher education college

1293


WHTA IS LIMT OF LEAKGE CURRENT OF 11 KV 1 CORE 1000SQ.MM. XLPE CABLE.LOAD ON CABLE IS AROUND 600AMP .LENGTH 500 MTRS.

1789


PLZ SEND ME SOME UNIQUE PROJECT OF ELECTRICAL ENG (B.TECH)

1596