Answer / nithi

we know, flux in the transformer depends upon the ratio V/F.
IF THERE IS A SITUATION OF
* over voltage with power frequency
* under frequency with rated or increased voltage
LEADS TO OVER-FLUX IN THE CORE & DRIVES TO SATURATION
REGION.IF ATTEMPT IS NOT TAKEN,LEADS TO BURNING OF
TRANSFORMER.

What will happen if we on 200kvr capacitor bank(11kv in bus)If there is low load on transformer (1.5 mva 33/11 kv)

0 Answers  

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I have a CT meter with ratio 60/5. The meter reading of previous month was 3290.49 and that of current month was 3797.26. How many chargeable units as per normal meter should be my reading.

0 Answers  

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what is corona ?

3 Answers  

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what is F.A.P in fire alarming system?

3 Answers  

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what would be the earth to neutral voltage in industries? if it is not main Taine then what will happen?

4 Answers  

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what is working parincipal of a ht transformer

0 Answers   Pidilite,

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What is meant rectifiers..

1 Answers   MTS,

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Is vtg is controlled by the resistor? if else how much?

0 Answers   Sail,

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what are the differences between MCB and MCCB ?

19 Answers   Bhel, DLF, Omax,

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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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what precautions to be taken while desigining a LT,HT panel. Eg-LT panel PCC panel with ACB installed. HT panel VCB panel with VCB installed. & what is main diffrence betwn IP54 & IP55 construction of panel.

0 Answers   Bhel,

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IF 8255 CONTROL WORD IS 94H,Tell the chip port work mode ?

0 Answers  

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