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Reisa, Aurellia Frasari and Indra, Nisja and Mirza, Zoni (2020) ANALYSIS OF THE HARMONIC IMPACT GENERATED BY VARIABEL FREQUENCY DRIVE ON POWER QUALITY AND LOSSES AT COAL MILL AREA SUBSTATION 448 INDARUNG 5 PT. SEMEN PADANG. Diploma thesis, Universitas Bung Hatta.