why the transformer primary and secondary windins vector groups vary? why it is something like Dy11 and not as Dy or Yy...

2 Answers  

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what is hourly consumption of coal in therma plant

2 Answers   NPCIL,

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what is the benift of HT metering & LT metering

1 Answers  

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What is the minimum distance between taransformer (say 2000 kva)and its earth pit?

2 Answers   Bhel,

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why motors are rated in HP?

3 Answers   HCL, ncpl,

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hoe to test voltage restrained overcurrent relay?

2 Answers  

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What is Energy based relay coordination & time based relay co-ordination? In which type of distribution arrangement these methods are applicable?

1 Answers  

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why DC source is used to idetify the polarity of CT/PT?

1 Answers  

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What is infinite Busbar?

4 Answers   Equate,

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what law motor works?

3 Answers  

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What is the difference between earthed & unearthed system?

2 Answers   HCL,

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what are types of servo motors

1 Answers  

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