Q5 A Discuss The Importance And Difference Between Emc Product Level Stage And Emc System Design B C 3 Marks Di 1 (147.45 KiB) Viewed 40 times
Q5 (a) Discuss the importance and difference between EMC product level/stage and EMC system design. (b) (c) (3 marks) Discuss the difference between the first and the second PCB and circuit designs in Figure Q5 (b). Explain which PCB design is better in terms of EMC design. (4 marks) A High Voltage (HV) power transmission line can produce a strong, time- varying magnetic field that induces a harmful voltage on the adjacent cable (victim) located close to the transmission line. As depicted in Figure Q5 (c)(i), assume that the future new railway track will be constructed near the electricity transmission line. In addition, the new control cable is laid parallel to the power transmission line at a distance of L = 2 km, and the distance between the control cable and its ground is 10 cm, as seen in Figure Q5 (c) (ii) (i) (ii) Represent the cable-induced voltage in a complete equivalent circuit. Label your figure. (2 marks) Calculate the total induce voltage (Vemf) on the victim cable if the magnetic field (H-field) produced by the AC power transmission line at the intended location is 0.99 uT. (6 marks)
(iii) (iv) As an engineer, decide whether the new control cable can be safely installed at the designated location based on ITU laws and standards. (2 marks) 33kV AC Power cable has been replaced with 750 VDC. Discuss why the DC power cable will not interrupt and induce a high voltage on the victim control cable. (3 marks)
2 km Victim cable Figure Q5 (c) (ii): Control Cable (victim) dimension 10 cm
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