difference between ac and dc motor

1 Answers  

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how snubber circuit works to protect switching devices?

2 Answers   Electrotherm,

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how we can check the CT & VT?

2 Answers  

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hi i am aziz electrical associate engineer. i am faceing problem in acs800 vvvf drive.it is tripping wothout any alarm/fault.i cheaked all parameters and fault function of drive, all are correct as well as communication parameters.but still it is tripping (drive is tripping in running position not in starting)

1 Answers  

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We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.

0 Answers  

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What is an automatic controller?

0 Answers  

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A resistance, inductance & capacitance are connected in series between points A & B.The voltage drops across the resistance,inductance&capacitance are found to be 40V,70V&100V respectively. What is the total voltage between between points A&B (Vab)? a)210V b)70V c)50V d)230V

6 Answers  

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hi frnds...pls send me aptransco previous papers .....pls..pls,,,(madhar.rocking@gmail.com)and suggest me some websites

0 Answers  

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what is difference between tension tower and suspension tower?

8 Answers  

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Any one Give me formula for to increse the power factor, 0.8 to 0.95, How much the KVAr Required

9 Answers   Emerson, Rajshree Sugars, Siemens,

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why we use condenser in the thermal power plant, althrough the same vapour will be again heated

0 Answers   Bhel,

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while grounding the galvenized metallic structures is it necessary to remove the galvenization at the point of contact? Or other wise is the galvenizatio a good conductor?

1 Answers  

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