How to calculate Burden Resistor ??

[MichelJasmin]

Yep! Lot of power! What about shorting the secondary and measuring the current with a current sensor like this:

http://www.allegromicro.com/en/Produ...Cs/ACS712.aspx

on a breakout board:

http://www.dx.com/p/acs712-5a-curren...7#.VLRjedKG_CY

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[amgen]

if you have way to calibrate and check linearity......

[andybarrett1]

Thank you Amgen

Nice Idea.... but pot Wattage needs to be decent size. (More power) ?

[amgen]

ok check these..... http://amploc.com/

[andybarrett1]

Thank you

The sensors all ready exist.. I am attempting to use the output for my purpose.

But will prob look at those in future.

Thank you again

[amgen]

From my experience working with CT's, putting a higher value resister across ct secondary will lower the secondary current by some factor but the voltage still has some relation to the primary current...... that's why a 100 ohm or 1000 ohm resistor will not create that much heat. My guess is that a 100 ohm load resister will probably drop the secondary current to less than 1 amp with 100 amp thru CT.

don

[andybarrett1]

Yep! Lot of power! What about shorting the secondary and measuring the current with a current sensor like this:

http://www.allegromicro.com/en/Produ...Cs/ACS712.aspx

on a breakout board:

http://www.dx.com/p/acs712-5a-curren...7#.VLRjedKG_CY

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I like this.....

Also a 30Amp Version.... Might not need a CT !!!

Thank you