For a balanced 3phase system with 3 conductors I know you can use the "2 wattmeter" method for determining the total power in the system with only 2CT's and 2PT's.
What about for a 3 phase 4-wire unbalanced wye system. Can you still use the "2 wattmeter method" or must you add additional CT's and PT's?
What about for a 3 phase 4-wire unbalanced wye system. Can you still use the "2 wattmeter method" or must you add additional CT's and PT's?