when we are going to higher voltage level in substations why we are using Sf6 circuit breakers instead of Vacuum circuit breakers.

3 Answers  

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What are the main Electrical IS rules?

3 Answers  

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what is armature reaction?explain in simple words?and what is its infleunce on dc motor

16 Answers  

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As per BIS, Earth pit resistence value?

4 Answers  

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why diesel tank is earthed

1 Answers   ABB, NTPC,

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ward lconard control

5 Answers   Bhel,

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generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...

0 Answers  

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i(1)= j0.5 p.u., i(2)= -j0.5 p.u., i(0) =j1 p.u. What kind of fault it is-- a)l-l ,b)l-l-g, c)l-l-l-g, d)l-g.

2 Answers   Areva,

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What is the method to solve circuit using source transformation?

0 Answers  

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WHAT IS REMOTE CONTROLLED DG? WHAT IS DIFFERENCE BETWEEN REMOTE CONTROLLED DG & NORMAL DG SETS

2 Answers  

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What are approaches to tackle sedimentation problem of reservoir?

0 Answers  

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how can we save enegry by using VFD for Resiprocating Air compressor which is having more unloading running hours

0 Answers   MRF,

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