hi i wonder will the speed of a 50hz AC motor reduce if i supply it with 25hz?

4 Answers   Divis Laboratories,

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HOW TO CALCULATE THE ILLUMINATION IN INDOOR LIGHTING?

0 Answers   L&T,

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what is the thumb rule for determination resistance of resistor?

0 Answers   Siemens,

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What is the most accurate way of testing ELCB?ELCB is better than RCD?

0 Answers   GECO,

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It is observed that AVR of an Alternator is more likely to fail if the Generator and Mains Neutral are directly connected to each other. Why should this be so?

1 Answers  

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why transformer does not obey ohm law?

27 Answers  

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1)we have 1000 cfm Blower,Dia-1Mtr,Velocity of air 94 m/s 2)We have Natural Air velocity 94m/s 3If i Put Wind Mill in natural air ,speed is 94m/s Then it will generate Assume 100kw 4)If i put same wind mill across the Blower,air speed is same 94m/s now the Question is Will it generate 100 kw?

0 Answers  

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last week we did the REF relay test by closing single pole (R phase) of CB and apply 380V at the primary of delta transformer. we get 33A at the primary of the R phase star end. but we get 380A at both R an B in delta side. how and why?

1 Answers   Siemens,

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why and how voltage sharing in transformer, during magnetic balance test ?

0 Answers   ME,

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in battery charging room we find two fuses (one in positive other in negative cables ).why it is so?one fuse is ore than sufficient?

0 Answers  

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what is surge suppressor?

5 Answers   Essar,

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Is there any problem about which the drive (inverter) doesn't show/display the alarm and/or fault but instead of this , it doesn't work ? I want to know that could there be any kind of problem in the drive when the drive doesn't display the alarm and/or fault ?

0 Answers   Siemens,

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