Answer Posted / raj

delta delta transformer is used in generating systems and
transmission systems because voltage is major
consideration(voltage is stepped up to above 11 or 33kv i.e
220 or 440kv) and delta star transformer is a distribution
transformer(stepped down to 11kv or 440v) because current is
major consideration, in distribution systems we need a
neutral, so the neutral point is taken from star connection.

explanation of mesh bus bars

2157

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i want wipro vlsi placement pattern please send me

1766

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Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.

5392

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Define demand factor?

1101

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Motor,transformers,capacitor tubelight etc....

1637

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What is Fire Panel ? How it works ?

2063

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what is formula for zero phase sequence of nuetal earthing transformer of 6.6 kv

2281

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Why we are using only Dyn11 tranformer in distribution system but not using a Dyn1 in distributing system?why not and advantage and disadvantage in both

2718

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Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?

1494

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In ht capacitor ckt we are using LBS Panel it having isolator with fuse, one of HT fuse flash over, so what is reason behind this event.

2077

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Explain about retrofitting of machine tool.

1890

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What happen Grid EARTH plat got cut.

2217

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What should be the length of transmission line so that we can see/obtain the full sine wave of voltage??

1891

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I Want randstand placement papers

1825

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What are the criteria shall be considers for sizing Fuse and MCB? If the rated current is 10Amps what should be the fuse size / MCB Size?

1628

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