I have an unbalanced IR Heater load setup as a delta load. Voltage is 3-phase 240VAC. There are multiple heaters in parallel between each pair of phases. We are simply looking for a method to tell how many bad heating elements there are.
I can measure the line currents easily, but I believe I need to convert these to phase currents to properly find wattage used between two phases. I can calculate line current magnitudes based on phase currents assuming 120 degrees of separation between phases. But, I cannot figure out how to calculate phase current magnitudes based on line currents. Using a recommendation I read on here from forum member topgone, I created an excel sheet that will use the add-in "solver" to find the phase currents required to match up with our measured RMS line currents.
While the excel solver does seem to work, I cannot figure out the equations to do it mathematically. Can anyone help me with a mathematical method to calculate phase currents from measured RMS line currents with an unknown-unbalanced delta load?
I can measure the line currents easily, but I believe I need to convert these to phase currents to properly find wattage used between two phases. I can calculate line current magnitudes based on phase currents assuming 120 degrees of separation between phases. But, I cannot figure out how to calculate phase current magnitudes based on line currents. Using a recommendation I read on here from forum member topgone, I created an excel sheet that will use the add-in "solver" to find the phase currents required to match up with our measured RMS line currents.
While the excel solver does seem to work, I cannot figure out the equations to do it mathematically. Can anyone help me with a mathematical method to calculate phase currents from measured RMS line currents with an unknown-unbalanced delta load?