What is basic impulse insulation level? And how it is calculated for sub- stati

What is basic impulse insulation level? And how it is calculated for sub-
station?

Question Posted / saylee

2 Answers
11786 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

What is basic impulse insulation level? And how it is calculated for sub- station?..

IEEE Std 141/1993 ch. 6.3.2 "Insulation tests and ratings"
specifies:

"Electrical power and distribution apparatus assigned a
given insulation class should be capable of withstanding,
without flashover or apparent damage, a 1.2/50 full-wave
impulse test of specified crest kV. This specified crest
voltage is the basic impulse insulation level (BIL) of the
equipment."

The BIL is not calculated but is stated by standards.

Is This Answer Correct ?

2 Yes

0 No

What is basic impulse insulation level? And how it is calculated for sub- station?..

Answer / madivalanagaraja@gmail.co

The Basic Impulse Insulation Levels refers to the ability of electric equipment such as transformers to withstand lightning surges. When lightning strikes a transmission line, a traveling wave is created. This traveling wave travels along the line and damages the transformer winding.

Surge arresters mounted on the line can mitigate the surge, however, they cannot totally eliminate it. Voltage surges can also be created by the switching of circuit breakers and switches.

The BIL or the Basic Impulse Insulation level indicates the ability of the transformer to withstand these heavy surges. Transformers with a rating of 600 volts and below are designed to have a BIL of 10 kV.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

draw a dol with the following rtds,stop/start,ct,vt and o/l supply is 6.6kv and the coil is 110v

1 Answers Anglo Eastern,

How to Calculate Transformer Earthing Electrode Rod Size both Body and neutral Earthing ? Any Standard Formula? Please Suggted

0 Answers EnPro,

in dc series motor if field wdg is shorted then

0 Answers

Why in earthing, the earthing plate is put in vertical position? and further what is soft coke that is used in earthing?

3 Answers Wipro,

What is the minimum underground tank size capacity considered for firefighting purpose?

0 Answers

How could i check the earth connection of my home using a multimeter?????? If it is possible plz help me....

1 Answers

which of the folowing has negative temperature coefficient of resistance? a. mercury b. copper c. lead d. carbon

2 Answers

how slip power recovery system work

0 Answers Ambuja,

What do you mean by ratio correction factor of instrument transformer?

0 Answers

In MEP Services what are parts of STP and what are there function?

0 Answers Tenon,

sir i want previous entrance exam papers for written test

0 Answers Vizag Steel,

which type of oil is used as a transformer oil?

3 Answers JSW,

For more Electrical Engineering Interview Questions Click Here