SELECTION OF SENSORS FOR ELECTRIC MOTOR PROTECTION SYSTEM
Keywords:
Keywords: Electrical equipment, reliability, diagnostic monitoring, protection system, electric motor, current transformer, Rogowsky coil, voltage sensor, resistive divider, voltage transformer, multi-parameter protectionAbstract
Annotation: This article discusses the importance of diagnosing and monitoring the technical condition of electrical equipment to ensure reliability and stable operation. It emphasizes the creation of multi-parameter protection systems to prevent failures in electric motors caused by voltage fluctuations, current overloads, short circuits, and temperature variations. The study highlights the use of current and voltage sensors in protection systems, particularly for low-power asynchronous motors. A current transformer and a resistive voltage divider were applied in laboratory experiments to monitor current and voltage values. For high-power motors, the use of Rogowsky coils and voltage transformers is considered more efficient. The paper also analyzes the principles of sensor selection, signal amplification, and the technical advantages of resistive dividers in low-power protection systems.
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