What should be ideal IR value for 11kV, un earthed, 1 MW motor?

3 Answers   Sail,

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Can anybody tell the formula to calculate temparature rise in the cable with respect to current?

1 Answers  

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Is it legal of using 3 phase motors in 2 phase in Tamilnadu?

2 Answers  

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Hydro P.P. run @ 600 rpm,8pole, Nucler P.P @ 1500rpm 4 pole , ThermlP.P @ 3000 rpm 2 pole.Why this diffrence??? when we can generate electricity @ 600 rpm then Why we had incresed speed in NPP & TPP???

3 Answers  

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what is the chemical reaction of solt and charcoal in earthing?

1 Answers   Shyam Group,

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why genarator genarating voltage 11 KV?

0 Answers  

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how df/dt relay operates & how it works?

1 Answers  

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What causal system?

1 Answers   NTPC,

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What is center gravity load in substation?

0 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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surge tank, hrc fuse, earthing transformer, firm power objective type

0 Answers  

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what is blocking diode and what is the use of it in tne control circuit.Pls Explain it.

1 Answers  

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