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Transformers Magazine Vol. 3 Issue 4
Dear Readers, For the purpose of one project, I have recently analysed publicly available data about transformer failures and their impact on the society. This was more of a qualitative analysis since the data was analysed for a specific season, so it is not representative of the whole year. Also, the input data was not available in the same format, and was sometimes incomplete and… 
Enhancing the switching capacity of change-over selectors with minimized gas production 1. General Regulated power transformers are equipped with a regulating winding with multiple taps which are connected to a tap-changer to adjust the transformer ratio. On-load tap-changers (OLTCs) are used if the ratio shall be changed while the transformer is under load. These tap-changers consist of a tap selector which connects two adjacent taps… 
Qualitrol has been in business since 1945. Qualitrol serves electric utilities, industrial and oil & gas energy customers globally. Our corporate headquarter is based in Fairport, NY. We have six centres of excellence and manufacturing facilities in US, Canada and UK. We have been steadily increasing our investment in professional manpower evenly spread across our centres of excellence. Recent growth of the power sector in… 
Power transformers are critical components in an electrical power network. Testing, diagnostics and reliable condition assessment of power transformers becomes increasingly relevant due to the aging of transformer fleets around the globe. Performing a range of standard electrical tests on a regular basis has proven to be an effective way of gaining reliable insight into the operating condition of transformers. But, this has been a… 
Power and distribution transformer markets Market values vs. market volumes Market values How do you estimate the current and future transformer market in any country, regional or global market? The answer is both very simple and extremely complicated.The first issue to establish is the definition of what products are within the scope of power and distribution transformers. To a large extent this is dictated by… 
Overview of Shell’s transformer oil unit As the senior technical person, based in the UK, I am responsible for all Shell’s product developments of industrial specialty lubricants, which include transformer oils, turbine oils, and some other lubricant areas such as process oils, refrigeration oils, etc. I have some 30 years of experience of developing and doing research to make finished lubricants, mainly with industrial-type products… 
The Value of a Technical Library Enter the office of most engineering types and there, on the shelf, you are likely to find a collection of prized reference materials. When pressed to share, often follows the tale of beloved resources never returned justifying heavy reluctance to lend out again. This valued labor segment (of which I proudly number) are the natural born problem solvers. Often… 
Abstract Infrared Thermography, Ultrasonic Noise Analysis, Partial Discharge Detection, Dissolved Gas Analysis, Vibration Analysis – all these techniques are great stand-alone diagnostic tools; however, when used properly, combining the data obtained through each technique, an incipient fault can be identified long before it degrades the insulation and creates a failure.This paper will provide guidance in setting up a complete Predictive Maintenance program to be able… 
CTR, a market oriented company CTR Manufacturing Industries Ltd., established in 1964, manufactures and distributes engineering and electronic products with manufacturing facilities at Pune, Aurangabad and Nasik in India.We have recently built a state-of-the-art HV electrical lab, which allows us to conduct extensive tests to validate materials and the design of tap-changer applications up to 400 kV.Our engineering is focused on market requirements, and the… 
Voltage regulation in evolving grid Voltage regulation has always been of vital importance in power grids. However, with the increase of renewable electricity generation, and with the development of smart grid, voltage stability and its regulation have become more important than ever before.As voltage regulation is achieved by the use of tap-changers, more transformers will have to be equipped with tap-changers than before. However, changed… 
Abstract With new threats endangering the safety of substations, critical infrastructure protection in substations has come to include sniper fire, ballistics and blast protection. Safe by Design approach allows that all types of design safety and performance criteria – fire, blast, impact, wind – cross over from safety to security. In this article Critical Infrastructure Protection innovations and strategy options are discussed, with a focus… 
Introduction Recent actions of leading international standards committees have set the stage for significant changes that will impact anyone who purchases and uses mineral oil. The term recycled mineral oil refers to all products that rely on some process of retreatment to convert oils which have already been used in service into a reusable product. While one major international committee has decided to create a… 
Abstract Transformers are becoming more and more space-saving, but they also need to be flexible, perhaps even mobile. All components must offer highest operational reliability, allowing quick installation as well as long-term flexibility. This is the reason why separable connecting systems are the next step in connecting transformers. As they are making progress toward replacing conventional connection methods, the importance of an entire pluggable product… 
1. Introduction Apart from their primary role in ensuring long-term protection of surfaces, anticorrosion paints must also be visually appealing in terms of their aesthetics, identification and security.Končar – Steel Structures is one of the leading manufacturers of metal structures for the energy sector. The company has successfully profiled itself as a manufacturer of demanding structures for application in harsh corrosive environments, such as offshore,… 
Abstract The article presents the most common diagnostic measurements on instrument transformers (current and voltage transformers) used to assess their condition and reliability. The measurements reveal possible failures which can occur due to aging processes during the lifetime of an instrument transformer. The failures are either related to the transformers’ electro-magnetic circuit (for example, short, or open circuits) or to their insulation (for example, partial… 
Company overview Oxyweld, Italian leading manufacturer of oxyhydrogen gas generators for brazing, marked its 35th anniversary and today, thanks to its experience, supports many transformer producers and repairs in over than 60 countries. These brazing technologies turn distilled water into gas and replace the conventional oxy-fuel cylinders (i.e. the most common oxy-acetylene or oxy-propane). Thanks to the flame’s properties, the system is specific for brazing… 
Sea Marconi is an energy and environment-focused company, providing lifecycle management solutions for holders of electrical equipment filled with insulating fluids. Founded in 1968 and headquartered in Turin, Italy, Sea Marconi now has five bases across Europe and South America, with operations covering over 3,000 customers on five continents.The company is independent from the manufacturers of equipment, producers of insulating oils and repairers and is… 
