Inrush Current

[Jabbajaws]

Can anybody tell how to mathematically calculate 'inrush current'?

Im talking of the current that rushes into lets say a light bulb on start up. Any info would be appreciated...

Ta very much...

 

[bugsy]

You won't get an inrush current for a light bulb because its a resistive load, inrush currents are associated with inductive loads

 

[Fred West]

Inrush currant can be calculated by multiplying the Outrush currant by a given factor.

This does depend on you location in the U.K.We in the South rush around all the time, so the number would be probable be around 4.Any where North of the Watford Gap things start to slow down, 1 would be correct.Once you reach Scotland it starts going backwards! Hope this helps.

 

[ghost]

Have a look at this site, I think it's what you are looking for.

http://grouper.ieee.org/groups/transformers/info/F01/IEEE_Inrush_Tutorial.pdf

Inrush currant can be calculated by multiplying the Outrush currant by a given factor.

This does depend on you location in the U.K.We in the South rush around all the time, so the number would be probable be around 4.Any where North of the Watford Gap things start to slow down, 1 would be correct.Once you reach Scotland it starts going backwards! Hope this helps.

I usually find things grind to a halt around the M25 Fred!