Between Star-Delta & Star-Star Power transformer which one is efficent for Earth Fault?

10 Answers  

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what is the difference between equipment earth and system earth.

1 Answers   Hofincons,

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sir, is there any ratio,this much of A.C volt is equal to D.C voltage

3 Answers  

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why did the BDV test in transformer?

2 Answers   Jindal Steel and Power,

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Thumb rule of cable size(rm>30 rm)X multiplying factor=ampere

0 Answers   Kazi Farms, SKI Carbon Black,

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if the load is reactive then what is the use of calculating the real power and what is the use of reactive power if my question is wrong please excuse me..

1 Answers  

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can we start mulitple 3 phase induction motors with common starter?

1 Answers  

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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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how to calculate short circuit current for the busbar

0 Answers   HMK,

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Why a single-phase induction motor not an inherently self-starting machine?

11 Answers   ETC, Hindustan Shipyard,

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what is the difference between line & phase current in star delta connection motor?

2 Answers  

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Why is the earth socket in an electrical plug outlet made thicker and lenghty?

5 Answers  

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