Answer / santosh

First stop the system folw.Make the reverse direction in
VFD & decrease the speed slowly.Now make it forword and run.

Answer / rahul

If fan get trip ultimatetly drive will trip . first reset
drive if problem is continue then check motor terminal
&then check drive terminal like forward run , reverse run

why in an electrical lab a bulb connected to supply goes off slowly when the main supply is switched off?

2 Answers  

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How to convert farad to kvar. both are the unit of capacitor.

5 Answers   College School Exams Tests, UltraTech, Vikram Ispat Industries,

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whay is snubber circuit , why we are using snubber circuit in thyristor

1 Answers   NEPC,

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why transformer are rated in kva.

5 Answers   Dalkia, Nalco,

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how can motor both beasrings insulation resistance can be check?

0 Answers   GE,

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what is difference b/t ac current and dc current

4 Answers   L&T, Meghana Engineers,

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how do you measure earth leakages in 3phase wires?

2 Answers  

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what is the CT of protection and CT of metering ? what is class 5P10 & 5P20 and class PS ?

16 Answers   JEE Main, ONGC, VRA,

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photo conductive cell

4 Answers   Bhel,

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Why only plate(copper) Earth pit given for neutral earthing? why not pipe(G.I) Earth pit?

1 Answers  

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Why is the earth socket in an electrical plug outlet made thicker and lenghty?

5 Answers  

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what is the terminal voltage of dc series generator running at rated speed at no load?

2 Answers  

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