The objective of this study was to assess the influence of procurement practices on thernoccurrence of failures of power transformers in substation projects, particularly after warrantyrnperiod is passed and the projects are closed. The study was made through case study of arnsubstation project called Electric Network and Reinforcement (ENREP) of the Ethiopian ElectricrnPower.rnThe study has utilized primary and secondary data sources. Primary data has been collectedrnthrough questionnaire and interviews while secondary data was collected through a desk study ofrnproject documents. Accordingly, the procurement practices particularly the procurementrnplanning, supplier selection and contract management found to influence the failures of powerrntransformers, though the incidences happened several years after completion of the project.rnIn the planning stage, there was problem in applying sound risk planning, market assessment ofrnqualified sellers, carrying out appropriate cost estimate for reliable products. In the supplierrnselection, the focus of the Ethiopian Electric Power was mainly on price and delivery schedule.rnWith regard the contract management, the practice seems good enough, however, there was gaprnin applying lessons from failed cases which might have contributed to the continued failures ofrnpower transformers.rnTherefore, to remedy the unprecedented failures of power transformers and other criticalrnsubstation equipment in the Ethiopian Electric Power, using proper procurement planningrnpractices to avoid potential risks, vetting manufacturers and their product in advance throughrnprequalification process, applying complete cost of ownership during evaluation with goodrncontract management including applying lessons learned to avoid similar mistakes in next projectrncan help to improve the situation which essentially means revisiting and making improvement onrnthe procurement practices of the Ethiopian Electric Power.