what is the uses of C.V.T transformer in switch yard?

4 Answers   L&T,

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how can H.V busbar in a powerstation can be protected?

1 Answers   Unitech,

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why are the maintaine power factor and how can this control and this is how work.

0 Answers   Mukand,

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What test must you do before powering up a circuit that you have been working on?

0 Answers  

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what is exact meaning of CT core saturation or simply saturation of core.

1 Answers  

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all the technical question with answers pleas send your email id ramar_eee@yahoo.com

0 Answers   RRB,

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what is the meaning of bus bar, in electrical panels.

13 Answers   HLG Habtoor Leighton Group,

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What is the difference between voltages or potential difference? And what are they?

0 Answers  

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can we replace d.c.motor by 3 phase induction motor for a particular application

4 Answers  

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Dear all i want to know FEWA Electrical Supervisor Licence test Previous Year Questions ? If any body know please send to me shibin_75@yahoo.com

1 Answers   FEWA,

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If the neutral wire go pass through the core balance current transformer? If yes then why? and no then why?

2 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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