Why rotating machines are not allowed to run near critical speed region?

2 Answers  

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how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test.

1 Answers   CPCL,

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V.c.b and a.c.b difference

4 Answers  

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In generation,transmission and distribution voltage frequency is either 50HZ or 60 HZ;why are only these frequencies?

2 Answers  

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How can we estimate Gen rotor current?

3 Answers  

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Why have the transformer one earthing to their neutral? Why have the transformer many earthing to their body?

1 Answers  

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Given a ckt,the max power dissipated in the load ZL ?

1 Answers  

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how wecalculate breaking capcity of acb mcb mccb .explain with example

0 Answers   C&S, L&T,

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How to calculate the 2500 Kva Transformer losses Primary 11KV Secondary 415volts

1 Answers   Laurus,

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define frequency ?

14 Answers   KPTCL,

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why a pilot exciter is used in combination with the main exciter? why not only a main exciter is used for excitation to an alternator?

1 Answers   Electrical,

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What is basic impulse insulation level? And how it is calculated for sub- station?

2 Answers  

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