How to calculate transformer capacity requirement for a project site?

5 Answers   ABB,

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prove that power consumed in 3 phase delta system is 3 times as compared to 3 phase star system

0 Answers  

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In 3.5X150 Sq.mm cable what does 150 stand for outer dia or inner dia?

4 Answers  

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what are the advantages by using IGBT in VSC HVDC than thyristor in conventional HVDC

1 Answers   Bhel, Eskom,

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what is relation between vector group of transformer and its load hormonics?

1 Answers   Sanmar,

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what will be project cost for 100 kv transformer connection under oyt scheme.

0 Answers  

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how power is generated,and transmitted to our home..pls explain briefly in simple words.

0 Answers   HAL, Subros,

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To attain a powerfactor more than .95, how much kvr should we use for 100 HP of current

4 Answers   Bhel, Scooters India,

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when an induction motor runs on load.at that time if we reduce the supply voltage the current increases.But when it runs without load,if we reduce the supply voltage the current also reduced.why?.i checked it practically also.

1 Answers   Birla,

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Why is copper a better conductor of electricity than aluminium?

5 Answers   AES,

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Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1.  H1-H2 = H2-H3 H3-H1 2.  H2-H3 = H3-H1 H1-H2 3.  H3-H1 = H1-H2 H2-H3 For the LV side also: 4.  X1-X0 = X2-X0 X3-X0 5.  X2-X0 = X3-X0 X1-X0 6.  X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0  H2-H0  H3-H0    X0-X1  X0-X2  X0-X3 128.0  119.9  7.2      29.2   13.3   15.8 70.7   128.4  59.2     23.4   22.0   3.6 7.2    120.1  128.1    13.4   29.3   15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?

0 Answers  

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What will happen if the d.c. Machine is operated below rated speed?

0 Answers  

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