The newer solid state POCO polyphase meter ( Landis&Gyr kbase S4 series AXS4e) reads the 3 phases as Phase A 0deg Phase B 180deg and Phase C (high leg) 270deg for Phase Voltages, then reads phase currents with phase angles corresponding - for example Ia 37deg Ib 215deg Ic 305deg yielding somewhere approx 0.8xx power factor each phase in my opinion. from Cos(37-0) Cos (215-180) Cos (305-270).
But how do we sum these to obtain the actual billed kWh? Why the orthogonal angles rather than 120deg?
Although this small general service does not have demand nor power fastor charges - we are trying to ballance the loads, apply power factor correction if needed to sub panels, and minimized billable kWH. The idea of investing in power factor and balance being that a closer to unity balanced system is easier to drive by a small sized standy generator even if the POCO does not charge power factor penalty.
In trying to manage the loading and relate the work we are doing to actual billable kWh we are reading the meter several times a day and logging that data - I am just having a hard time relating our "in the field" true rms power probe readings to the accumulated digitially integrated meter readings. Can convert the vars to watts with the Cos(angles) as above but how does that L&G meter vector sum 0deg, 180deg and 270deg for billable kWh?!
But how do we sum these to obtain the actual billed kWh? Why the orthogonal angles rather than 120deg?
Although this small general service does not have demand nor power fastor charges - we are trying to ballance the loads, apply power factor correction if needed to sub panels, and minimized billable kWH. The idea of investing in power factor and balance being that a closer to unity balanced system is easier to drive by a small sized standy generator even if the POCO does not charge power factor penalty.
In trying to manage the loading and relate the work we are doing to actual billable kWh we are reading the meter several times a day and logging that data - I am just having a hard time relating our "in the field" true rms power probe readings to the accumulated digitially integrated meter readings. Can convert the vars to watts with the Cos(angles) as above but how does that L&G meter vector sum 0deg, 180deg and 270deg for billable kWh?!