How to calculate cable size in sq units based on motor rating is KW

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Can you tell me more about pu systems (per unit systems )calculation in large power systems? how to get the base for voltage and power in generator, transformator and transmission lines?

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If 11 KV breaker on the primary side of a 11 KV/3.3 KV 12.5 MVA transformer can be installed at a distance of 1000 mtrs through a 11 KV cable. If no what are the probable reasons.

1 Answers  

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Explain (in simple ) - root mean square. whats its role in electrical fundamandal.where its used

0 Answers   MRF, PPCL,

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A three phase transformer 460v primary 220v secondary (three phase four wire system.) Why did we get 460 volts across the neutral on the secondary side?

3 Answers  

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is any body explain me why return current in three phase power system is less then in a red, yellow, blue phases??? as we know Ir+Iy+Ib=In then why nutral wire has less then phase current????

2 Answers   Bhel, DRIEMS,

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what is the requirement regarding earthing of Single conductor with AWA

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why in US MAINTAIN 60hz,110volts when compared with 50hz,220v in india

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what are the main applications of transistor in non-linear region?

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Why most of analog o/p devices having o/p range 4 to 20 mA and not 0 to 20 mA ?

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how to measure the current by compact digital equipment with dislay which fit inside any equipment

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CAn a TJM 10 relay measure over current ?

2 Answers  

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