Answer / uttam lal

to reduce the core losses in transformer. core loss is the sum of hystersis and eddy current loss

Answer / b.deepika reddy

To suppress the core losses/constant losses/Iron losses..especially Hysteresis losses..
Hysteresis +Eddy current =Iron losses

in an industrical wiring, why we are using lighting DB and Power DB separately?

3 Answers  

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Why usually in all electrical equipment taking more current in Y pahse like pumps,compressor,or any other applications

1 Answers   Chemplast,

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what is meant by slip & where its occur ?

5 Answers   Lanco,

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Apparent power is expressed as V * I(Conjugate). Why not in V * I ?

0 Answers  

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what type of loads are inductive load & resistive load ?how they different between each other ?

5 Answers  

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There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.

1 Answers  

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i have dry type transformers can you help me that how many tests i can do to know the performence of transformer and also please tell me about the BDV test and Insulation resistance test in oil cooled transformers

4 Answers   Hyundai,

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why white color LED light is not possible?

1 Answers  

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formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?

0 Answers  

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what is the switching substation

2 Answers  

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Can anybody tell me why inductors draw lagging current and capacitors draw leading current from supply?

4 Answers  

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Is Indian railway uses 25000v ac or dc?

7 Answers  

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