This document presents the work of a proposed application of natural ester as a transport agent of water in transformer Off-Line Dry-Out procedures. It shows transformers drying process as a measure of maintenance for ...

This work presents a study and application of the Duval Method for alternative insulation fluids. A tool for incipient faults diagnosis is developed. The properties of silicone oil and natural ester as dielectric fluids ...

This study was carried out in order to statistically analyze physico-chemical characteristics of mineral insulating oils used in distribution transformers. Such analysis is exclusively aimed at the dielectric insulating ...

This work aims to present an analysis of temperature rise test on transformers associated with the definition of control parameters in the measurement and monitoring of temperature, oil transformers, focusing on the evolution ...

This work proposes the development of an application on the analysis of gases dissolved in mineral transformer oil, of all classes of voltage and power, the Duval Triangle method. Through simulations in the application, ...

The present work aims to propose a hydrodynamic study of a gas relay using the computational fluid dynamics tool, in order to predict the speed, temperature variation and oil pressure profiles, based on their physical ...

Siemens Energy provides energy solutions, produces power transformers and offers after-sales maintenance service. In the structure of a power transformer, its insulating part consists solely of mineral oil and cellulose ...

Neste trabalho verificamos o potencial das técnicas de absorção UV-Vis e de fluorescência para o monitoramento da degradação do óleo mineral isolante (OMI), utilizado em transformadores em função do seu aquecimento. Foram ...