Published by Maciej GWOZDZIEWICZ1, Piotr KISIELEWSKI2, Wroclaw University of Science and Technology (1), KISIELEWSKI Sp. z o.o. (2) Abstract. The papers deals with six-phase 2 kW 2-pole induction motor without enclosure. The motor is made of laser-cut construction steel , electrical steel and copper sheets. Shaft, two flange cartridge bearing units are machined by theContinue reading “Enclosure-Less Six-Phase Induction Motor”
Tag Archives: Safety/Protection
Resource-Saving Protection of Powerful Electric Motors
Published by Mark KLETSEL1, Abdulla KALTAYEV2, Bauyrzhan MASHRAPOV2,National Research Tomsk Polytechnic University (1), Pavlodar State University (2) Abstract.The article presents the disadvantages of traditional and some new electric protections of powerful electric motors. It is proposed to eliminate these drawbacks by constructing phase-sensitive protection that does not use current transformers, with a majority circuit andContinue reading “Resource-Saving Protection of Powerful Electric Motors”
The New Design of the Vacuum Circuit Breaker Mounted on the Roof of Electric Traction Units
Published by Piotr BORKOWSKI1, Łukasz NOWAK1, Stanisław SZYMAŃSKI2,Department of Electrical Apparatus of the Technical University of Lodz(1), Factory of Electrical Apparatus Woltan(2) Abstract. This article presents the research on new design of a vacuum breaker type DCU-800M mounted on the roof of Electric Traction Units. The impact of one circuit breaker on another one wasContinue reading “The New Design of the Vacuum Circuit Breaker Mounted on the Roof of Electric Traction Units”
Dissecting Electric Motor Malfunctions
Published by Alex Roderick, EE Power – Technical Articles: Dissecting Electric Motor Malfunctions, October 20, 2021. Learn about the important electric motor parameters, such as voltage rating, acceleration time, overcycling, and insulation resistance, that should be taken into account to avoid electric motor malfunctions. Electric motors are designed and sized to operate in HVAC systems forContinue reading “Dissecting Electric Motor Malfunctions”
Troubleshooting Electric Motor Power Circuits
Published by Alex Roderick, EE Power – Technical Articles: Troubleshooting Electric Motor Power Circuits, October 15, 2021. The two major parts of a motor circuit are the motor power circuit and the motor control circuit. Learn some basic troubleshooting tips for these kinds of motor circuits. A motor power circuit is the section of an electricalContinue reading “Troubleshooting Electric Motor Power Circuits”
Safety Standards for Testing Instruments
Published by Alex Roderick, EE Power – Technical Articles: Safety Standards for Testing Instruments, November 24, 2021. IEC standards reduce safety hazards that can occur from unpredictable circumstances when using electrical test equipment such as test instruments and meters. The International Electrotechnical Commission (IEC) is an organization that develops international safety standards for electrical equipment. TheContinue reading “Safety Standards for Testing Instruments”
Transformer Maintenance: Planning for Failure
Published by Ahmed Sheikh, EE Power – Technical Articles: Transformer Maintenance: Planning for Failure, September 26, 2023. This article examines transformer maintenance, including simple checks involving temperature and sound that indicate potential issues, maintenance procedures for energized and de-energized dry transformers, and assessments for energized liquid-cooled transformers. Because transformers are so reliable and most of theirContinue reading “Transformer Maintenance: Planning for Failure”
Tests of Selected Distance Protection Functions of Modern Protective Relay used for HV and EHV Transmission Lines Protection
Published by Marcin JANUSZEWSKI, Ryszard KOWALIK, Karol KUREK, Emil BARTOSIEWICZ, Adam SMOLARCZYK, Désiré D. RASOLOMAMPIONONA, Warsaw University of Technology, Electrical Power Engineering Institute Abstract. This article describes the comparison of test results of distance protection functions (ANSI 21) implemented in protective relays of various manufacturers dedicated to HV and EHV lines protection. A special emphasisContinue reading “Tests of Selected Distance Protection Functions of Modern Protective Relay used for HV and EHV Transmission Lines Protection”
Distance Protection Analysis Applied for Distribution System with Distributed Generation
Published by João T. L. S. CAMPOS1,2, Huilman S. SANCA1, Flavio B. COSTA3, Benemar A. de SOUZA1, Universidade Federal de Campina Grande (1), Universidade Potiguar (2), Universidade Federal do Rio Grande do Norte (3) Abstract. In power systems, the over-current protection scheme and, optionally with directional function, and distance function are the main protection used,Continue reading “Distance Protection Analysis Applied for Distribution System with Distributed Generation”
Autotransformers for Power Systems
Published by Waldemar ZIOMEK, PTI Manitoba Inc., Winnipeg, MB, Canada Abstract. When the primary and secondary voltages are obtained from the same winding, or from two windings which are galvanically connected, such a transformer is called an autotransformer. The paper will focus on fundamentals, design and applications of autotransformers of core-type design. The selected problemsContinue reading “Autotransformers for Power Systems”
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