How to calulate Locked rotor amper(LRA) for compressor type motors?

0 Answers   MAF Dalkia,

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when voltage increases then current also increases then what is the need of over voltage relay and over current relay? can we measure over voltage and over current by measuring current only?

1 Answers  

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we the the value of frequency is 50 HZ in DG then why we said the value inductive rectance is zero in DG?

1 Answers  

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physical identification of HT & LT panel

0 Answers   Schneider,

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which VFD is better ( LT or HT)

0 Answers  

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the cheapest inducting instrument among all is a)pmmc b)moving iron c)electrodynamometer d)rectifier

2 Answers   APCPDCL, APEPDCL,

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How to select the earthing transformer,for DELTA TO DELTA TRANSFORMER OR ALTERNATOR SIDE.Pls post your answers and calculation.

0 Answers  

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what is the difference between earth leakage and earth fault?

0 Answers   L&T,

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Batteries used for electrical energy storage are a. Laclanche cells b. Edison cells c. Lead acid cells d.any of the above

0 Answers  

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There is air in a room . the top and bottom of the room are at constant temp. T1 and T2. DRAW THE temp profiles if a. T1 greater than T2 b. T1 less than T2

0 Answers  

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What is Surge Capacitor? Why it is require in Generator Circuit Breaker,inspite of surge arrester?

0 Answers  

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WHAT HAPPENS IF STARTER OF A FLUROSCENT LAMP IS SHORT CIRCUITED AND WE PUT THE SUPPLY ON?

1 Answers  

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