what is name of transformer oil ?

58 Answers   L&T, MPSEB, OPTCL, Practical Viva Questions, Servo, TATA, XLPE, ZGL,

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what should be distance between two electrical earthing pit as per i.e.e

13 Answers   Badve,

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I got shortlisted in RRB thiruvananthapuram for the post of Junior Electrical engineer, waiting List - 7. i want to know about the validity of the current list and chance to get the job please help anybody knws abt it,, thank you

1 Answers  

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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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it is possible to measurement of tension of slipring induction motor(SRIM)carbon brushes, any maesuring instruments are available in the markets.

0 Answers  

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what is a bus riser in power system and why it is used

2 Answers  

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when i am going to take trail on a 3ph sq.i/m motor 5.5kw, i observed that RPM of the motor is very low as compared to the rated RPM and also it rotates in clockwise in first ON command,and anticlock wise in second ON command. finally i observed that on phase is no available . but iam not clear about, why the motor is rotates in both directions without any phase interchanging.pls answer to my question.

1 Answers  

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Induction generator has = A negative speed B negative slip C negative voltage D negative current

2 Answers  

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What is CBCT ,why and whereit is used?

2 Answers  

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why characteristics of overcurrent relay is time-->psm instead of time-->current?

0 Answers   ABB,

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What is spike & surge.

2 Answers  

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What is mechanical interlock?Explain the uses?

2 Answers   HSL,

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