1) What is the angular displacement of 3 phase voltages?

2) What is the line voltage if phase voltage is 415V in delta connection?

3) Which is the type of load when the phase currents of a 3 phase circuit are same?

4) Which is the type of load if the phase currents of a 3 phase system are different?

5) How many number of watt meter to be used for balanced 3 phase power measurement?