@thesis{thesis, author={Makkulau Andi and Rosikh Muhammad Nabila}, title ={ANALISIS EFEKTIVITAS PENGARUH PENGGUNAAN DIRECT ON LINE DENGAN VARIABLE SPEED DRIVE PADA MOTOR PUMP SOP STORAGE di PT PINDO DELI}, year={2023}, url={http://156.67.221.169/5954/}, abstract={Motor pump sop storage at the Deinking Plant is used to send back pulp products that are wasted from the final production to preprocessing again. On discharge pipe have a problem vibrations when the opening control valve is 40%, that make the result in the lifetime of the control valve used to regulate flow doesn?t last long time. this research aims to improve the modifying control of motor pump sop storage which previously used Direct On Line was replaced by using a Variable Speed Drive to increase efficiency by controlling the rotational speed of the motor pump needed according to flow. this research using comparative quantitative methods and will be comparison the power of induction motor. After being replaced with VSD, the speed of the pump sop was set at a rotational speed of around 970 r/min with a more stable load trend. There was an increase in the temperature of the pump motor after replacing with VSD from 55oC to 68oC, because the rotation speed of the fan motor was reduced due to the VSD setting, previously when using DOL the rotation speed was 2965 r/min to 970 r/min. The results of the calculation of the total power within 30 days, on control DOL is 1126.25 kW and VSD is 584.38 kW, with an average percentage of power savings after using VSD is 47.03%.} }