Railway Basic electrical engg technical question with answer

1 Answers   Indian Railways,

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you have an automatic voltage regulator at home for your appliances,if the voltage in your area drops from 220v to 190v,does the output of the automatic voltage regulator drops?or does it retains the 220v output?

4 Answers  

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how can we connect a distance relay to CT core that is for backup protection or metering?

1 Answers  

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What is the power requirement of tamil nadu for one month?

0 Answers  

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What is infinite Busbar?

4 Answers   Equate,

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the circuit having same properties in either direction is known as.......

2 Answers  

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i want to know that how the height of Ct ,cvt ,LA calculated on the basis of creepage distance

0 Answers   Vedanta,

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Why we use duplex coil and hook switch in telephone system?

0 Answers  

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what instruments used for measuring of inductance and capacitance.

2 Answers  

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What Is HO factor in power selection

0 Answers   Wonderla Holidays,

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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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what is diffential relay? testing proceure?and transformer reach Over load thet time differencilal relay operate or not ?

5 Answers  

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