Answer / raghavendran

I am not sure but,this could be the reason, the Electrical
field intensity producing corona on contaminated areas,
water droplets, icicles, corona rings, ... This corona
activity then contributes nitric acid to form a chemical
soup to change the bonding cements and to create carbon
tracks, along with ozone and ultraviolet light to change the
properties of NCI insulator coverings. Other detrimental
effects include water on the surface or sub-surface freezing
and expanding when thawing, as a liquid penetrating into a
material and then a sudden temperature change causes change
of state to a gas and rapid expansion causing fracture or
rupture of the material.

Answer / aboli

I think impure water or ice being good conductor of
electricity,due to ice coating the insulator may get
directly short ckted.this could be called as puncturing of
insulator by ice coating.

when the Transmission and Distribution network where is the "feeder" lines are located? and why should be used in T&D network.....

0 Answers  

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Is there any particular formula for sizing the bus bar based on the current rating

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0 Answers   HAL,

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you are a electrical student, why are you coming for software job.

4 Answers   TCS,

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What is function of Diesel Generator?

2 Answers   Bhel,

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how to calculate the no load current in transformer?

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Please elaborate th´evenin’s theorem?

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how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?

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0 Answers   Jaypee,

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1 Answers   Mukand,

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I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id: vsujith_rajan@yahoo.co.in

3 Answers   RRB,

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if two transformers are parallel & both have fault short ckt. impedance of 50KA in each case will it increase or decrease show example?

1 Answers  

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