Answer / rishad

In a star connection Line Current is Equal to Phase Current. i.e.

Line Current = Phase Current

IL = IPH

Where as in delta line current= 1.732 phase current

Answer / amar

In star, resistance across two terminal become three times as compare to delta.

Answer / anand yadav

The motor starting current can be reduced by following methods;
1. Start the motor without load.
if not possible
2. Use auto transformer starter
or
3. Use soft starter

Answer / k.prakashchandra

The motors are usually designed to run in delta connection i.e. each of the three windings to take line voltage . When you start in star connection , each winding is subjected to phase voltage , Hence the starting current will be less .

How relay works, reverse relay, master relay, os relay, earth fault relay and what is its setting point

0 Answers   cpgn,

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calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.

0 Answers  

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What is the winding resistsnce need to be in a 1000kva, 11kv/415v transformer, between ht winding to lt winding, ht winding to earth, lt winding to earth.?

1 Answers   Trident,

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why ac signals are sinosuidal

2 Answers  

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what is high - pot test. what's its use?????

0 Answers  

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What is the difference between neutral and ground?

3 Answers   Cethar Limited, Torrent Power,

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i want to know how to calculate the battery capacity based on the UPS . ex i want to run have one kva UPS Which should run 10 hours ? in that case how many batteries to be installed and what will be the AH Value .

2 Answers  

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according to faraday's law whether the induced emf is average or rms value?

2 Answers   Power Grid,

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plz send me the syllabus or any sample paper for engineer trainee recruitment if any,on ravinder911@yahoo.com

0 Answers   Bhel, Maruti Suzuki,

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how we calculate full load current of A.C & D.C Motors?

1 Answers  

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-What is leakage current . how much leakage current is allowed.

3 Answers  

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Why Nutral CT rating for Earth Fault Protection of Transformer neutral shall be 20% of Full load Current of Transformer

2 Answers  

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