Q1. You have been asked to investigate if a paper mill is in compliance with ER G5/4. It is supplied from an 80 MVA, 33/11 KV transformer with 4% reactance and 1% resistance. The site demand on the utility is 9 MVA. The load is a 6-pulse, three-phase bridge diode rectifier. 1. Read about ER G5/4 2. Calculate for each harmonic, the rms value of current (1), the circuit impedance (Z) and the voltage (V), then sum the THD. [2.5 Marks]

Q1. You have been asked to investigate if a paper mill is in compliance with ER G5/4. It is supplied from an 80 MVA, 33/11 KV transformer with 4% reactance and 1% resistance. The site demand on the utility is 9 MVA. The load is a 6-pulse, three-phase bridge diode rectifier. 1. Read about ER G5/4 2. Calculate for each harmonic, the rms value of current (1), the circuit impedance (Z) and the voltage (V), then sum the THD. [2.5 Marks]

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter59: Motor Startup And Troubleshooting Basics

Section: Chapter Questions

Problem 12SQ: How is a solid-state diode tested? Explain.

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