What will happen if mains neutral and generator neutral shorted?

2 Answers   Betts, Suzlon,

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how do we calculate length of starting time and repeated starting of a direct online starter?

0 Answers  

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what is the difference between vector scale and vector diagram?

1 Answers  

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how to reduce the power consumption in office ?

6 Answers  

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What is gain margin?

0 Answers  

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why two point starter,three point starter, four point starter cannot be used for A.C machines?

2 Answers  

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How do you classify the different types of torques?

2 Answers  

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WHAT ARE THE EFFECTS OF SERIES RESONANCE AND PARALLEL RESONANCE ON THE CIRCUITS PARAMETERS?

0 Answers  

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1. What is differential relay? How it operates?

3 Answers  

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What is function of condenser in fan?

3 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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I am working in 600MW power plant currently in erection phase. I came along this term and want to know its meaning in simple language, consider me naive!?? All motors shall be of energy efficient type EFF-2 as per IS:12615/ equivalent IEC / International Standard.

1 Answers   Punj Lloyd Ltd,

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