Answer / raja sekhar

b'coz u can know that the high voltage winding has low
current and when switch is tapped there is less possibility
of geetin arc

Answer / jagadeesh

i think to reduce the leakage flux

Answer / anu

Tap changing at HT side is more efficient

What is the purpose of taking Capacitance and Tan Delta Test in Transformer bushing?

1 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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what is meant by excitation current & armature current ? where its produce & how we can calculate ?

0 Answers  

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What is the In door to Out door Sub Station.

5 Answers   L&T,

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ELECtrical

2 Answers   Bahwan Engineering, Bhel, Electrosteel, NBCC, Qatar Airlines,

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why we use to transmit the power in three phases intead of single phase ?

5 Answers  

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advantages of vvvf drives over non vvvf drives for EOT cranes

2 Answers  

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If 11 KV breaker on the primary side of a 11 KV/3.3 KV 12.5 MVA transformer can be installed at a distance of 1000 mtrs through a 11 KV cable. If no what are the probable reasons.

1 Answers  

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how "rabbit ACSR" conductors are more efficient than "weasel ACSR" conductors

1 Answers   AITM,

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why transmission lines traveled in high voltage?

5 Answers   TATA,

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what is the formula for backup time of online ups?

1 Answers  

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why the voltage transmission is always in a multiple of 11? e.g. 110 V, 220 V, 33 kVA, 11 kVA

16 Answers   IAF, MahaGenco,

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