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Transformers Magazine Vol. 5 Issue 2
Dear Readers, Not long ago, a book related to transformers came to my hands, with one of the opening remarks stating that to date, fundamental transformer technology hasn’t seen a significant change since transformers were first invented more than a century ago. Although this type of a statement is something that we hear and read about regularly in conference papers etc., this time it made… 
Go-team for power plants RMS Energy prides itself on being a go-team for power plants and generation facilities worldwide with an emphasis on inspection, repair, maintenance, refurbishment and replacement of major critical power systems, including bus systems and transformers. RMS Energy is a partner-oriented company, working with many service providers like Siemens, ABB and others in the industry to deliver outstanding service on projects,… 
AbstractOxyweld produces oxyhydrogen gas generators for the brazing and cleaning of continuously transposed cables. The technology is based on the process of turning distilled water into hydrogen and oxygen, completely eliminating conventional oxy-fuel cylinders. The latest innovations implemented in Oweld gas generators include gas pressure adjustment, automatic mixing of the gases, and a concentrated flame that helps reduce the brazing time and overheating in the… 
Completing the globally interconnected electricity grid Abstract The total global load at the present moment in time is between 23,000 GWh to 24,000 GWh and this will probably increase by a factor of three by 2050. The Global Energy Interconnection Development and Cooperation Organisation – GEIDCO is promoting "Global Energy Interconnection which is "Smart Grid + UHV Grid + Clean Energy"; it is an… 
Cost-competitive European quality BOLLINA is a family-owned company manufacturing slitting lines, cut-to-length machines, levelling cut-to-length lines, and combined lines that can provide both cutting and slitting by the same line. Our core business is steel industry, which is diversified in many fields, from the construction of buildings to roofing and plumbing market. Our customers are mostly small and medium-size service centers which process different kinds… 
AbstractSince steelmakers have started to produce grain-oriented electric strip in widths of up to 1,250 mm, producers of transformers have been increasingly demanding core-cutting lines capable of handling such wide strip. By processing wider strip, manufacturers reduce production costs while increasing the power efficiency of the transformers. GEORG is the only manufacturer in the world to offer core-cutting lines designed for these strip widths. Keywords:… 
Beneficial investment for transformer maintenance Abstract Transformer is the most important and pricey piece of equipment in the transmission system, so an adequate maintenance strategy is required to ensure uninterrupted electricity supply, preserve transformer life and minimize the investment. The crucial phases to ensure reliable and economical exploitation of a transformer within any maintenance strategy are inspection and audit of the manufacturing process, and adequate… 
Abstract Current transformers are used in all branches of the electrical system covering two major applications: first, energy metering systems and; second, protection and control schemes. Failure to comply with rated accuracy and performance characteristics may derive in unexpected mal-operation of the system and potential loss of major assets as well as possible interruption of electric energy supply to consumers. In the field, effective condition… 
Future of substation monitoring: It is not just the software Abstract The future of online monitoring of HV substation equipment is closely linked to Enterprise Asset Management systems provided that proper measures are implemented for the EAM system to deliver the expected results. Those measures include trained personnel, detailed knowledge of one’s assets, technically and economically feasible maintenance process, flow of information to personnel,… 
Abstract:Digitalization changes everything: by 2020 50 billion “things” will be connected to the internet, and every day more than 5.5 million new devices are being connected. Enterprise analytics platforms like Siemens’ Mindsphere® enable users to develop analytical tools according to their needs in a very easy way. At this year’s Hannover trade show, Siemens Transformers will launch a completely new product class dedicated to digitalization. … 
Transformer health and risk indexing Abstract Modern asset management systems make use of risk based decision methodologies. This means that not only the frequency or the consequence of an event is regarded, but also the product of both. In order to transform operational and maintenance data into decision information that supports the asset manager in taking well-substantiated decisions, use is made of health and… 
AbstractElectricity utilities across Europe are under increasing pressure to meet regulatory requirements for both environmental and cost-efficient energy supply. A well-established option in asset management is the recycling of transformer oils. With the smart “closed-loop” model, EOS is supporting the industry to meet the required objectives. Through best practices, used transformer oil is collected and regenerated to as-new oil quality and fed back into the… 
Abstract Cast-resin power transformers are widely used in areas of high standards concerning fire hazards and environmental protection. The most common reason for failures of cast-resin transformers is the electric breakdown of the cast-resin insulation between turns or parts of the windings. In many cases, partial discharges (PD) occur before the breakdown happens. By testing the windings with induced voltage in combination with a sensitive… 
Introduction Rising urbanization leads to increase in population density, which poses big challenges for ensuring sufficient supply of electricity. Therefore, safety and fire resistance are taken as top priorities today in the construction of skyscrapers, shopping centers, metro systems, etc., considering that any electrical failure, especially in oil-insulated equipment, could cascade into catastrophic fire incidents. So, what can we do to minimize the risk of… 
Abstract Variable shunt reactors (VSR) with on-line tap changers are a cost-effective solution for compensation of reactive power and maintaining voltage stability, especially with the growing use of renewable power sources characterized by volatile demand of reactive power. Shunt reactor is based on an iron core design with air gaps which must be created to ensure mechanical stability with low vibration and noise. The wide… 
Abstract Ergon is the world’s largest manufacturer of naphthenic specialty oils. Its HyVolt insulating oils have been the leading choice for transformer manufacturers and utilities for decades. Naphthenics have long exceeded performance expectations in the transformer market and will undoubtedly remain the industry standard for years to come. Ergon has achieved its global position thanks to the company’s security of supply, growing worldwide presence, commitment… 
Abstract Dissolved gas analysis is a common technique in the supervision and maintenance of transformers. It can give hints on defects and faults in oil-immersed transformers by determining and quantifying the gases arising due to the thermal or electrical stress. Different algorithms for the assessment of transformers, which utilize data obtained from dissolved gas analysis, have been published so far. However, only few investigations exist… 
Abstract Transformer insulation consists of liquid (mineral oil) and solid (cellulose) parts. The influence of temperature, oxidation and moisture degrades the insulation, creating acids and sediments that negatively affect its characteristics. While there are different methods of insulation renovation, this article will present regeneration and drying in online mode, which is one of the best methods that siginificantly extends the life of the transformer. Keywords:… 
Celebrating 40 years of innovation Working in a market that everyday becomes more global and more competitive, state-of-the-art technology plays a key role in determining the competitiveness of any business, and the transformer industry is no exception. For this reason, at L.A.E. – Lughese Attrezzature per l’Elettromeccanica S.r.l. we have a strong focus on technological innovation. At the same time, this year we are celebrating… 
