I am using ade7880 for energy metering.I am using a CT with max input current 63A and ratio is 1:252
To calculate values of registers like WTHR, VARTHR, VATHR, VLEVEL and VNOM, we require following values:
Firstly i have a doubt what is U,Ufs,I,Ifs?
In my opinion :
U->nominal rms phase voltage (which i need to decide 220V/110V rms)
I->Nominal rms phase current (i need to decide--- say 10A rms)
Ifs->rms phase current for full scale adc input(63/root2---rms)
Ufs->?How to calculate Ufs?
Acc to datasheet -->Ufs and Ifs are rms values of phase voltages and currents when the ADC inputs are at full scale.
and U and I are nominal rms values.
How to choose The meter constant (MC, in impulses/kWh)-1600/3200/4800/arbitrary?
Thirdly,What is the value of constant----- n------ used in calculation of WTHR, VARTHR, VATHR?
Please help me with the above issues and let me know where i am wrong?