A step-up bulk-power transformer had just been installed for the Unit 1 of Egbin Thermal Power Plant in the Lagos area, Nigeria. It was required by due practice to ascertain that it was in good functional condition and that it was installed to international standards. In this paper, the author presents details of the physical inspection and thirteen tests that were carried out. The observations from inspection and the results of the tests were analyzed with a view to ascertaining the condition and availability of the equipment for service delivery. The analysis indeed proved the power transformer to have satisfied international standards in virtually all aspects of the transformer tests considered and that it did not suffer defects arising from transportation hazards. To that extent the equipment was properly installed only that it yielded over 50% excess resistance than the factory stipulated (reference) resistance on the high voltage side which was, however, not satisfactory.

Full text: IJEIR_1610_Final.pdf