Answer / koodalingam

To protect the primary winding of the potential
transformer.If you not earthed the system,the unbalance
voltage will appear between neutral and earth.This voltage
can damage winding.

Answer / vinod

in EHV single phase PT are using, primary one end need to
earth for taking stable 3 phase secondary from three single
phase PT

Why neutral wire is heating in symmetric single phase distribution of three phase power supply?

2 Answers  

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This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers  

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in three phase 11kv transformer (11kv/433v) input( R,Y,B) output (X,Y,Z,N) the connection as follows 1 phase R -open 2phase y connected to both R and y of input] 3phase B- B what is the output voltage X to N ,Y to N , Z to N

2 Answers   Bescom,

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How many distance in distribution pole OR 33Kv line pole

2 Answers   Sail,

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how we select ac fuse rating of an power inverter???

0 Answers   Simco,

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How stabilizer works

1 Answers  

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how can we calculate air compressure capacity

1 Answers  

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what is first pole to clear factor

1 Answers  

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i had aplied Hindustan Petroleum corporation limited for the post of maintenance technician -Electrical,i want model questions,if anybody have please send it or please advice?

0 Answers  

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Advantages of low voltage drive (control panel)

1 Answers   ABB,

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what is model question rrb junior engineer electrical gr.II

0 Answers  

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sir,i am swati. i am goin to gv jspl exam on 21st nov'10. iwant previous year question paper. plz help me out. my emailid is swatisinha.dav@gmail.com

1 Answers  

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