Answer / pradeep chauhan

Killo volt ampere in Reactive power

Answer / b.janardhaan rao

Normally the word KVAR used in capacitor banks. it is reactive power. Kilo watt ampere.

in 3 phase induction motor resistance value is how much

1 Answers  

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what is the diffrence between dol and star delta strater? why star delta starter used instead of dol?

3 Answers  

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how can we make cable shedule for controll wiring ? which details must be required for it.?

0 Answers   L&T,

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Why two main buses and one transfer bus scheme not using for 400kV switchyard

5 Answers  

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When and where resistance earthing is used ? How to calculate the time constant for earth fault

0 Answers  

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how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating

0 Answers  

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What should be the protection scheme for a 15kw, 3-phase motor working in a lathe machine.

0 Answers  

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how to calculate kvar in Akiva

0 Answers  

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a distribution transformer(3 phase)supplying 440volt per phase.now suppose one of phase voltage(230volt) becomes zero.what will be the cause ?

3 Answers  

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What is electrical energy ,power?

2 Answers   ABB,

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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?

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two TG running in parallel at equal load.one TG CB tripped in reverse power relay.after tripping found its excitation was on & turbine running at rated speed.Please clearify why that TG tripped in reverse power ?

1 Answers   Bhel, Birla,

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