Answer / kj

Insulators are generally white inside. A glase is put on
them during firing. The colour of the glase depends on the
manufacturer. Many have used brown but many others have
used white or blue glase as well.
As far as the insulating properties of the insulator it
generally does not matter what the colour is as long as it
does not conduct.

Answer / dipen patel

Genrrally its depends on manufacturer. also brown colour are easily visualable.In a india mostly brown are use but in a many country blue and white also used .not a actual reason for a brown .@@@@@Dipen patel.@@@electrical department @@@gutarat tec. uni.

Answer / jitendra

Because in these colour we can easily find Cracks and these Reflect less amount of Lights (Sunshine).

phase colour is indicated by R Y B (red yellow blue) but in transformer i have seen U V W instead of (R Y B) have any meaning of this

3 Answers   Areva, Kim Yew,

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What is VFD, and how its work

5 Answers  

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what is the difference between mho characteristics and quadrilateral chara in distance protection

1 Answers   Essar,

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WHAT IS THE DIFFERENT BETWEEN MCB & MPCB? & HOW IS USE?

3 Answers   Gandour,

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1)Why electric shock is feel ?? n in a Electric Train why we didnt feel that ? 2)What is the reason for transformer Noise ?? 3)What is relation b/w Transmission Lines & Communication Lines ? 4)Which material is used for making Transformer oil & How u measure its dielectric strength & Name the test ?

14 Answers   NTPC, Tata Power,

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Why don't we provide SURGE ARRESTORS for Transformer feeders?

5 Answers  

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how to find total current when kva is 30.4 given ? should we use root 3 (1.732) in the formula?

2 Answers  

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In supply RYB are mentioned. But in transformers, why they are mentioning XYZ?

3 Answers  

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How to differentiate 220 Kv & 132 Kv line transmission tower if there are no specifications given on towers?

3 Answers   Karam, Power Grid,

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Define de-sensitivity?

0 Answers  

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what is slip resistance? how much its value in 110 kw motor? why voltage is varied in vvvf drive ?

1 Answers   Reliance,

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Spacing of Transformers ratings are 10kva,15kva,25kva,63kva,110kva,150kva .........so on Q) Why transformer are not manufactured having ratings in between or other than these standard ratings ?

3 Answers  

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