If a fan get trip and run in reverse direction due to system flow. Now in this condition during starting how can a VFD bring this negative speed to zero and later run in forward direction?

2 Answers   Aditya Birla, Siemens,

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what is leading and laging please in details

3 Answers  

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what are the protecyion of transformer & generators

0 Answers  

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In case of power/distribution transformer what is percent impedence?

1 Answers  

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what is reactive power?

8 Answers  

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waht is the working principle of saft starter & what is the difference in vfd & saft starter

2 Answers   Cipla,

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what is frequency response?

0 Answers  

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what happens when ac supply is given to the dc motor and dc supply is given to the ac motor?

1 Answers   GATE,

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What percentage netural current is in netural depend upon the phase current

1 Answers  

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Define Electrical Insulation and examples of Solid,Liquid and Gaseous insulating materials?

0 Answers   MPPTCL,

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What is transformer tap changers please explain

3 Answers   Feedback Venture, Sail,

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What is cable tray, its type, and its support?

0 Answers  

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