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

what is the harmonics.

3 Answers   DLF,

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what is the aircraft voltage and frequency standard ?

1 Answers   Jet Airways,

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in our transmisison sub station why we step down firstly 132kv\33kv then 33kv to 11kv. can we direct step down 132kv to 11kv.

2 Answers  

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when u are given a timer,push buttons and contactor, how do i practically make a star delta control circuit and a direct online control circuit?

1 Answers  

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How do we calculate conductor size?

1 Answers   Hero Honda,

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What is SMPS,How does it works?

4 Answers   Bharti, TCS,

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Which machine u will prefer to use at where flameble gases are comming out & why?

1 Answers   NTPC,

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for 11KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV UG system what will be typical per KM "R" "L" "C" parameter.

0 Answers   wbsedcl,

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WHAT IS DIFFRENCES DCS & PLC

1 Answers   Essar,

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What is the formula to find out the kvar required to improve the powerfactor from .85 to .99 at 1500kw, 415v.

4 Answers   Trident,

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what is the difference between online and offline UPS?

4 Answers   Prestige,

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what is AVR in alternator how its work?

8 Answers  

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