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Information × Registration Number 0226U000795, (0123U103223) , R & D reports Title Improvement of apparatus protection of household and similar electrical appliances popup.stage_title • Удосконалення апаратного захисту електричних приладів побутового і аналогічного призначення Head Chepeliuk Oleksandr O., Кандидат технічних наук Registration Date 16-01-2026 Organization National Technical University "Kharkiv Polytechnic Institute" popup.description1 The purpose of the work is to develop recommendations for improving the hardware protection of electrical appliances for household and similar purposes against unacceptable voltage deviations in the power supply network in accordance with the requirements of modern standards and expanding its functionality popup.description2 The primary result of this research is the development of a new-generation microprocessor voltage monitoring relay (VMR). The device protects household equipment from failures caused by voltage deviations, such as surges, sags, or neutral conductor breaks in single-phase networks. A key milestone was the successful PhD thesis defense in specialty 141 – Electrical Power Engineering, Electrical Engineering, and Electromechanics. The core innovation lies in the implementation of adaptive protective characteristics according to the IEC 60255-127 standard. Unlike existing counterparts, the device allows a choice between dependent (inverse-time) and independent time delays. This ensures a selective response: the relay maintains operation during minor fluctuations but instantly disconnects the network during severe faults, minimizing false trips. To ensure measurement accuracy, a digital filtering algorithm based on the Fourier transform was developed to eliminate noise and sine wave distortions. Experimental results confirmed a measurement error within 0.21–0.69%, significantly outperforming serial production samples. The hardware is based on 32-bit Cortex M0+ and RISC-V cores. Using bistable relays eliminates heating and minimizes power consumption. The functionality is enhanced by Hall sensors for non-contact current and power monitoring. Integration of IoT (Bluetooth Low Energy) and machine learning enables the device to classify loads and monitor parameters via smartphone. The results are implemented in the educational process at NTU "KhPI" for specialty 141 students and at the production facilities of AVM AMPER LLC. The developed mathematical models and circuit solutions are utilized in creating new relay protection devices, confirming the high practical significance of the work. Product Description popup.authors Yevhenii Y. Zorin popup.nrat_date 2026-01-16 Close