what is the difference betn earthed and unearthed cables which is commanly used why?

2 Answers   Bhel, Power Grid,

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what is the unit of current

12 Answers   RRB,

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HOW to speed control of induction mototr using scalar control

3 Answers  

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How to design the earth grid for lightning protection in an industry

2 Answers  

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What is the principle of Excitation.

1 Answers  

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what is PWM in IGBT and how it works for drive.?

0 Answers   BRG,

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What is Lockout Relay and what is use of it in electrical installation

1 Answers  

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WHAT IS THE FUNCTION OF RCCB

2 Answers  

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If a ACB breaker is tripping and closing problem, then what will we check internal..?

3 Answers  

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what types of electrical & mechanical test conducted in switchyard?

0 Answers  

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What causal system?

1 Answers   NTPC,

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A 3 phase motor operating off 415V system is developing 20Kw at an efficiency of 0.77 and power factor of 0.73. determine:- a)the line current. b)the phase current if winding are delta connected. c)the phase voltage if winding are star connected.

1 Answers  

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