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Electrical Knowledge Development Test 1. (Name _______________________)
Describe the nominal single-phase supply in Europe in term of Vrms, Vpk and frequency?
Describe the nominal three-phase supply in Europe in terms of Vrms, Vpk and frequency?
Draw a star (also called a Wye) connected load and label the line current, phase current, line voltage and phase voltage. 
With a star connected load, give the equations to convert a line current to a phase current and a line voltage to a phase voltage. 
Give the equation for the power dissipated in this circuit. 
Where is the neutral connected to this load.
What is the current in the neutral. Explain your answer using phasor diagrams for a balanced and unbalanced resistive loads.
Draw a delta (also called a Mesh) connection load and label the line current, phase current, line voltage and phase voltage. 
With a delta connected load, give the equations to convert a line current to a phase current and a line voltage to a phase voltage. 
Give the equation for the power dissipated in this circuit. 
Where is the neutral connected to this load
A star-connected load consists of three identical coils each of resistance 30Ω and inductance 127.3mH. If the line current is 5.08A, calculate the line voltage if the supply frequency is 50Hz.
Three identical capacitors are connected in delta to a 415V, 50Hz, 3-phase supply. If the line current is 15A, determine the capacitance of each of the capacitors.