Answer / dwivedi sandeepdhar

it should not be less than 6m

Answer / k.prakashchandra

For EHV lines, the clearance above ground shall not be less
than 5.2mtr + 0.3mtr for every 33000 V or part thereof by
which the voltage of the line exceeds 33000 V, provided that
the minimum clearance along or across any street shall not
be less than 6.1mtr. And clearance between lines ( not
conductors),shall be not less than the height of the taller
tower above the ground.

WHAT HAPPEN WHEN A DROP OF WATER MIXED UP WITH TRANSFORMER OIL ?

4 Answers  

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How would we calculate the no of earthing pits required for motor /panel

5 Answers   APGenco, National Engineering Industries, Practical Viva Questions,

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We normally make oil soak pits under Transformers. Oil from soak pit goes to collection pit. We provide granules/pebbles under transformers. My question is weather granules/ pebbles to be filled in soak pit or not? if yes upto what level?

0 Answers   Bhel,

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what is the use of spherical metal balls attached on to the earth wire of transmission over head lines?

2 Answers  

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A 11000/415V distribution transformer is fed 415V upon it's LT side,Do I get 11000V upon it's Primary side ?

7 Answers  

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We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.

2 Answers   KPTCL,

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whats the diff b/w mpcb and mcb?weather it trips on single phasing or not.

9 Answers   Electra Power, Essar,

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Which one hurts more AC or DC Current ?

10 Answers  

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1.what is the easiest way to convert AH(ampere hour)to watts?.

2 Answers  

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Why CT's shall not be kept open?

5 Answers   ABC, Qatar Gas, TIPL,

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is power factor correction related with vector group of transformer i.e:Dyn11?

1 Answers  

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what is the difference between between open delta and broken delta?

5 Answers   Reliance,

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