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Review Questions: 1. What is the diode conduction angle in a three phase three pulse rectifier? 2. What is the output voltage of a three phase three pulse rectifier operating on a line to line voltage of 220V? 3. What is the output voltage of a three phase three pulse rectifier operating on a line to neutral voltage of 220V? 4. With reference to a three phase supply, draw the voltage drops across Diodes D1, D2 and D3 respectively (from 0° to 390°). Consider the diodes to be silicon diodes. 5. With reference to a three phase supply, draw the current waveforms through Diodes D1, D2 and D3 respectively (from 0° to 390°). 6. What are the advantages of a three pulse rectifier over a single pulse rectifier?