Answer / scb19422000

Because the difference between the applied voltage and the
back emf is more than normal in both the cases,as with
lower applied voltage the speed will be less due to higher
slip hence lower back emf.

Answer / prakash

In induction motor torque is directly proportional to square of current. Therefore if voltage is less than to maintain torque slip is increases , impedance decreases and current increases also when voltage increases than all magnetizing component of current increases so current increases.

1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?

0 Answers  

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if a damaged 500kva transformer with %impedance 2.6 is replaced by two transformers of 250Kva with different % impedance will they be able to catter the load. what will be the ratio of load on the two transformers if the % impedance is in the ratio 1:2

2 Answers   Siemens,

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What mean by MLTP

0 Answers   Machino,

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Why are use 22 kv 3ph supply ?

1 Answers   IOCL,

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What is Horan Gap Fuse? Where it is used?

1 Answers  

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A low wet bulb temperature indicates

0 Answers   Caterpillar,

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What is deference between MCB & MCCB & ISOLATOR

0 Answers   Prakash Industries, Standard Chartered,

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what is the function of gss in the dg set.

0 Answers   Cushman Wakefield,

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how to define that what is resister ,capacitor& inductor.

1 Answers  

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Why relay connected R phase and B phase.?

1 Answers  

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how to calculate the cable size for 500 kva transformer?

3 Answers  

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We have one Energy meter for Measuring the voltage,current,power,energy(KWH,KVARH,KVAH) & power factor.The problem is that the meter does not show whether the PF is lagging or leading.So i want to know that is there any way or calculation to find out that whether the PF sign (lagging or leading) depending upon the above mentioned parameters?

4 Answers  

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