The gas power plant in Tanjung Datuk has been required in optimal condition, because it has crucial role to supply electricity for Pekanbaru areas. This research purposed to analyze and evaluate the performance of generator machine at gas power plant in Tanjung Datuk. There are two generator machines that always operate for 24 hours, so the maintenance of these machines has been essential to applied. One of maintenance approach is the Total Productive Maintenance (TPM). In this research, the TPM tool to measure effectiveness machine of generator used Overall Equipment Effectiveness (OEE), continued to analyze the OEE six big losses. After that, calculation of Mean Time To Failure (MTTF) and Mean Time To Repair (MTTR) to know the lifespan or maintenance on generator machine especially on AVR (Automatic Voltage Regulator) component. The results were obtained the OEE value rate of 63.98%, the value of MTTF and need to be treated every 1,688.17 hours, while for the MTTR value of 1.831 hours. To improve the effectiveness of the generator machine has done the maintenance in accordance with the appropriate schedule and implementation of the TPM approach.Keywords: OEE, Generator, TPM, Mean Time To Failure ( MTTF) dan Mean Time To Repair (MTTR).
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