This paper presents the design and implementation of an energy monitoring system based on the SDM630 multifunction meter, developed for applications involving three-phase electrical machines. The main objective of the proposed system is to provide a practical solution for monitoring and analyzing the operating behavior of electrical machines in both industrial and laboratory settings. The system performs real-time measurement and continuous logging of key electrical parameters, including phase and line voltages, currents, active and reactive power, energy consumption, power factor, and frequency. Data communication between the SDM630 meter and the unit of monitoring is implemented using the Modbus RTU protocol, selected for its suitability and reliability for industrial environments. Measured data are stored locally and processed offline to enable further analysis. Statistical processing is applied to assess operating conditions, identify energy consumption trends, and evaluate the stability of machine performance under different loading conditions. Parameters such as mean values, fluctuations, and temporal trends are considered to support energy evaluation and basic diagnostic analysis. The system architecture was designed with flexibility in mind, allowing straightforward integration with supervisory systems and potential future extensions, including remote monitoring and data visualization platforms. Experimental tests were conducted on three-phase electrical machines operating under various load conditions levels. The experimental results demonstrate that the proposed system provides consistent and accurate measurements, confirming its suitability for continuous monitoring tasks. Owing to its straightforward design, low implementation cost, and reliance on commercially available components, the developed system offers an effective and accessible solution for energy management, performance assessment, and power quality monitoring in three-phase electrical machine applications.