A5056251528- High voltage insulation and dielectric phenomena
- Electrical Fault Detection and Protection
- Power Quality and Harmonics
- Lightning and Electromagnetic Phenomena
- Power Transformer Diagnostics and Insulation
- Magnetic Properties and Applications
- Non-Destructive Testing Techniques
- Welding Techniques and Residual Stresses
- Electrostatic Discharge in Electronics
- Environmental Impact and Sustainability
- Advanced Electrical Measurement Techniques
- Energy Efficiency and Management
- Power Line Communications and Noise
- Noise Effects and Management
- Thermal Analysis in Power Transmission
- Risk and Safety Analysis
- Electricity Theft Detection Techniques
- Sensor Technology and Measurement Systems
- Impact of Light on Environment and Health
- Electric Vehicles and Infrastructure
- Electromagnetic Compatibility and Noise Suppression
- Occupational Health and Safety Research
- Recycling and Waste Management Techniques
- Quality and Safety in Healthcare
- Reliability and Maintenance Optimization
Universidade de São Paulo
2014-2025
DuPont (United States)
2024
University of Calgary
2024
S&C Electric Company (United States)
2024
In the late 19th century, three-phase induction motor was central element of productivity increase in second industrial revolution Europe and United States. Currently, it is main load on electrical systems global terms, reaching approximately 70% energy consumption sector worldwide. During 20th electric motors underwent intense technological innovations that enabled significant performance gains. Thus, this work analyses changes squirrel-cage rotor (SCIMs) with mechanical powers 3.7 kW, 37...
O setor energético impacta significativamente o meio ambiente e aproximadamente 70% do uso final de energia elétrica no industrial estão em motores elétricos. Na indústria brasileira consumo eletricidade representa 68%. A 4.0 (I4.0) tem relação direta com a eletrônica recursos computacionais. Este trabalho discute, contexto da transição energética, as políticas os padrões mínimos conhecidos como Minimum Energy Performance Standard (MEPS) etiquetas - uma das principais formas apoiar...
Metal oxide varistors based on ceramic technology are extensively used nowadays as limiting voltage devices, covering an amazing range of systems from microelectronics equipment up to very large power system networks. These formed through the sintering a mixture ZnO or SnO<;sub>2<;/sub> metal oxides with several other dopants containing elements O<;sub<;2<;/sub>, Bi, Sb, and Cr [1], [2]. The electrical behavior is governed by microstructure in which conductive zinc grains surrounded...
The three-phase induction motor was the fundamental component for productivity and growth in second industrial revolution Europe United States late nineteenth century. Presently, it is main charge electrical systems on a global level. In Brazil, reaches more than 65% of total electricity consumption. Policies were established minimum efficiency level to improve energy Brazilian system. legislation performance electric motors recent because first document issued 2002. Based policies...
With the current concerns about sustainable development and energy consumption in buildings, water pumping systems have become essential for reducing consumption. This research aims to develop guidelines assessment of multifamily buildings. The methodological procedures are: (i) definition efficiencies electric motors; (ii) pump efficiency levels; (iii) determination consumption; (iv) construction scale projects assessments. results obtained were that centrifugal pumps with 40% higher...
This research aimed at developing a technique for field evaluation of aged 345 kV ZnO surge arresters, identifying suspect equipment with in service failure risk. In this way, material damages, emergency downtime periods and personal hazards could be avoided. After some failures class the analysis failed showed burning signs blocks surface inside arrester, probably caused by internal superficial electrical discharge. The coating blocks, under high gradient, seemed to have suffered kind...
An evaluation of relevance current asymmetry on arc flash tests intended to determine rating parameters fabrics and garments, as well face shields, gloves, other materials were performed. Asymmetrical is mentioned in American Standards (ASTM F 1959) be maximum during a reference International Standard IEC 61482-1-1:2009, item 6.9, where an X/R ratio required obtain factor 2.3, with recommended source voltage 2000 V. IEEE 1584 studies the hand states all calculation processes not clearly...
Two main features provided by electric motor manufacturers are power factor and efficiency. However, the values reported often different from measured values. Thus, this work presents results obtained testing 435 Three-phase Induction Electric Motors with Squirrel Cage Rotor 38 tested between 2015 2016. The data were collected through standardized tests performed at Laboratory of Electrical Machines Institute Energy Environment University Sao Paulo. compared in laboratory. indicate that 58%...
This paper presents the results of research aiming to develop partial discharge detection techniques in high voltage equipment, at substation environment. Measurements frequency components leakage current, equipments' grounding conductor, were performed. procedure was performed with equipment energized and without disconnecting it from system. The generated current pulse is picked up by a CT, detected an oscilloscope. identification made considering previously obtained laboratory results,...
Considering the number of failures in high voltage power transformers caused by problems bushing and winding insulation, it is important to study means for diagnosing incipient failures, avoid long unavailability periods its consequences. The aim this work detection measurement procedures, concerning evaluation position partial discharge inside transformer, order evaluate degree danger equipment. methodology based on a noninvasive discharges from transformer bushing. source estimated...
The rational use of energy systems is one the main discussions in sustainability 21st century. Water pumping are most significant consumers electricity urban systems, whether for water supply, sewage, or vertical buildings. Thus, this work aims to present Industry 4.0 (I4.0) technologies applied buildings’ focusing on efficiency, supervision, and control system. involves four steps: (i) identifying existing I4.0 (ii) mapping possibilities applying building systems. study includes analysis...
The gapped silicon carbide (SiC) surge arresters are being removed from the operating system of utilities, however, a large number still installed in power system. Therefore, it is very important to give priority SiC that more degraded order replace them by zinc oxide (ZnO) ones. This work shows leakage current measurement, normally used as diagnostic technique for ZnO arresters, can also provide information concerning condition arresters. Results laboratory tests and substation measurements...
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