Greetings,

I have been stumped at what calculations I should be performing to determine power consumption from an electrical main. I have 3 CT's giving me a 0-5V feedback and I want:
1. Watts
2. Peak
3. Peak Demand
4. Watt-hours

I think I know how to get #1 W = V x I x 1.73 for 3 phase power - is this going to give me an accurate relationship?

#3 seems simple enough - storing the highest #2 value for a given period - ie. peak for a day, week, month and year - but how do i Calculate #1,2 and 4?

Any help would be appreciated. Even if it just points me to some other refrence material.

Thank you,
Drew