Transformers Magazine Special Edition – Bushings

Transformers Magazine Special Edition - Bushings
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Dear Readers,

It is my pleasure to present you with the special edition of Transformers Magazine dedicated to bushings.

Following the collection and preparation of the materials for this edition, I set forth to create a summary that would highlight in brief the most important points on the subject of bushings. While doing so, I spoke to a number of experts, among them an experienced transformer designer from a well-known transformer company, who attracted my attention with an interesting claim that in the past few decades we haven’t seen a single significant leap in the bushings technology. And by the leap he didn’t only refer to natural movements in the evolution of such a product, such as the advancement in the material technology where better materials would replace the existing ones, or expanding the voltage level of the product, but he also referred to a more comprehensive, quantum leap in the bushings technology.

Nevertheless, I still find it impressive to see bushings for 1100 kV and 1200 kV voltage levels. If we think about the scale of the impact of the development in the industry as a whole, it is probably true to say that only a small number of us will ever come to encounter and work with these solutions, either directly or indirectly, so the real impact of this development may be expected to remain quite limited.

Foreword to the Special Edition

Bushings are a very important part for a great deal of HV equipment. Without bushings, actual large power transformers are unthinkable. Throughout history they have shared their development with...

Interview with Oliver Haerdi, CEO of Moser Glaser

Growing with PFIFFNER Group Moser Glaser is an independent producer of transformers, wall bushings and busbars. We are a Swiss-based company with 128 employees, and a part of PFIFFNER...

Column: Market review

Transformer bushings market trends Global market development Introduction We estimate that the global market for transformer bushings was worth a little under US$1.4 billion in 2016. The market is...

Power transformer bushings – market trends

Abstract Bushings are critical for the safety of power networks. With the power transformer collective market expected to reach around 3.1 billion USD in the European Union over the...

Natural evolution

Hubbell Power Systems focuses on traditional and modern bushing technologies One Hubbell What happens when two of the industry’s leading North American capacitance graded bushing manufacturers are joined into...

Fundamentals of condenser bushings

Abstract This article focuses on the concept of capacitance-graded, i.e. condenser bushings – both oil-impregnated and resin-impregnated paper bushings – for extra-high voltage transformers. After a description of the...

RIF® bushings

The paperless, dry-type bushing technology Abstract Paper-insulated bushings (OIP and RIP) have been the dominant bushing type for the power transformer industry for many years. However, as our transformer...

Condenser bushings condition monitoring

Abstract This article focuses on condenser bushings monitoring, of both oil-impregnated and resin-impregnated paper bushings, for extra high-voltage class transformers in order to avoid a catastrophic transformer failure that...

Adaptive Response Technology

Increasing profitability and avoiding failures What do the Tennessee Valley Authority, Chicago Mercantile Exchange, Gerdau AmeriSteel, and Mitsubishi Electric have in common? They all have a critical need for...

Transformer bushing monitoring

Higher accuracy leads to better faults detection   Abstract Transformer bushings are one of the most critical components of a transformer. Up to 20% of major failures on high...

The value of on-line bushing monitoring

Bushing test standards for off-line bushing testing are defined by the IEEE and IEC [IEEE C57.19.00-1997 & IEC 60137/2003-08]. Until recently, bushing testing has been limited to a capacitance...

Reduce costs with smart transport monitoring!

Cargolog® Impact Recorder System Abstract Incorrect handling during transport can damage your product, both visible as well as concealed damage, which can be difficult to detect. Whether you are...

Oil-impregnated paper bushing insulation diagnostics

Abstract As reported in CIGRE TB 642, windings, tap changers and bushing related failures are the major contributors to transformer failure. About 17% of transformer breakdowns are caused by...

Transformer bushings and oil leaks

Abstract Many oil-filled large power transformers have been in service for years. One issue with aging transformers is addressing oil leaks. This article describes a cost-effective technique for repairing...

Diagnostics of HV bushings through oil sampling and analysis

Abstract Bushings are highly stressed parts of power transformers and their failures can lead to a transformer breakdown. The diagnostics and predictive surveillance of bushings is essential for uninterrupted...