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.

How does CT can measure the high value DC current?

4 Answers  

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what about the power of wattmeter at starting and loding?

0 Answers   TATA,

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132/66kv sub-station procation ?

0 Answers  

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y we use neutral,all r told its used to for closed path..k its a just used to closed path,in a transmission line y we put same conductor used n both phase and neutral..if we use less than phase conductor in neutral mean we ll reduce cost its right r wrong..if we use mean any problem occur in transmission line..

0 Answers   ME,

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If a capacitor bank is having rating 750kvar for 6.6kv. Then for 3.3kv how much will be the rating of capacitor bank.

1 Answers   OCL,

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0 Answers   NPCIL,

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CAN ANYBODY EXPLAIN WHAT ACTUALLY MEAN BY THE PHASE DEFFRENCE? R,L,C CIRCUITS?

5 Answers  

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3 Answers  

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How can we have to decided motor connection as a STAR-DELTA or DELTA-STAR?

3 Answers   IOCL, Jindal,

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hi i have a 400kva transformer i want to know the test i can use to check on it thx

1 Answers  

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5 Answers   Gold Fields,

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electricity bill multiplication factor 487.20xconsumption=total unit in kwh. what is 487.20 ?

1 Answers   Spec International,

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