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Burden resistor Value for ade 7880

Question asked by anur on May 16, 2013
Latest reply on May 28, 2013 by hmani

Hi ,

 

m Designing energy meter using ade7880

I am using 252:1  external CT with max. input of 63A. Output current for 63A input is 250ma.

Using following formula for Burden resistor in evaluation i am calculating the values according to my CT.

 

R1=R2=1/2*(0.5/root2)*(n/Ifs)

 

I am taking following values to be put into the formula:

 

n=252

Ifs(rms)=63A/root2=44.55A

 

I am getting the result of burden  resistor as 1 ohms.

 

Please confirm the above solution and correct me if am wrong.

 

Thanks

With Regards

anur

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