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500 kV Line Allowed U.S. Utility to Compare Performance of Glass Insulators & Hardware

500 kV Line Allowed U.S. Utility to Compare Performance of Glass Insulators & Hardware

September 9, 2017 • ARTICLE ARCHIVE, glass, Utility Practice & Experience Comments (0)

Salt River Project, based in Phoenix, Arizona, was among the world’s first utilities to employ composite insulators along the entire route of a major transmission line. Insulation on this line – the 500 kV Mead-Phoenix Project, commissioned in the early 1990s – was designed so that, if necessary, it could one day be converted easily ...

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Aesthetic Design Helped Danish TSO Obtain Approval for New 400 kV Line

September 9, 2017 • Utility Practice & Experience Comments (0)

Not long ago, the Nordic country of Denmark became the first place in the world where the ubiquitous lattice transmission tower is no longer accepted for any power line construction. While relatively small and with a population of only some 5.6 million, what...

RIS Bushing Technology: Reliability Testing & Field Experience

September 15, 2017 • ARTICLE ARCHIVE, Bushings Comments (0)

Problems with bushings are one of the leading causes of transformer failure and that means their proper selection can significantly impact transformer and substation safety. Traditional bushing technologies such as oil-impregnated paper bushings (OIP) and...

Benefits Justify More Use of Transmission Line Arresters

September 15, 2017 • Arresters, ARTICLE ARCHIVE Comments (0)

Application of gapped (EGLAs) or non-gapped (NGLAs) transmission line surge arresters (TLSAs) offers perhaps the best opportunity for power engineers to improve system reliability. However, as important as this may be, the value of using them transcends this...

Maintenance Strategy Designed to Support Gulf Regional Energy Security

September 9, 2017 • ARTICLE ARCHIVE, Utility Practice & Experience Comments Off on Maintenance Strategy Designed to Support Gulf Regional Energy Security

Under the aegis of the GCC Interconnection Authority (GCCIA), members of the Gulf Co-operation Council, including Kuwait, Bahrain, Qatar, the United Arab Emirates, Oman and Saudi Arabia as host, undertook an ambitious project to link their electrical systems....

Technology & Application Review of Arresters that Extend Life of Cables

September 9, 2017 • Arresters, ARTICLE ARCHIVE Comments (0)

There are basically three types of arresters used to protect high voltage power cables. The first, known by two names – deadfront (IEEE) or separable (IEC) arresters – is used primarily on distribution systems and often found in pad-mounted cabinets. The...

Rules for UAVs in U.S. Benefit Power System Applications

September 22, 2017 • ARTICLE ARCHIVE, Maintenance Comments (0)

Perhaps the major constraint to the burgeoning growth of unmanned aerial vehicle (UAV) technology is governmental oversight to ensure their expanded use does not pose risks to civil aviation or the public. Fortunately, new rules from the FAA make it legal,...

Glass Insulators Used for Network Expansion at Norwegian TSO

September 2, 2017 • glass, Utility Practice & Experience Comments (0)

Statnett, the Norwegian TSO, is in the process of a major network expansion along its Western Corridor – the transmission grid in the country’s southwest. This multi-billion dollar project will span several years and be completed in stages, referred to as...

Performance & Ageing of Semi-Conducting Glaze Porcelain Insulators

Performance & Ageing of Semi-Conducting Glaze Porcelain Insulators

September 2, 2017 • ARTICLE ARCHIVE, HV/HP Testing, Insulators Comments (0)

Although porcelain insulators have been used widely at all voltage levels for many years now, they have not performed entirely without problems. These typically tend to occur when pollution and moisture combine to form a highly-conductive layer on their...

Figure 6: Non-gapped line arrester (NGLA). CLICK TO ENLARGE

Considerations in Arrester Lead Design & Application

September 15, 2017 • Arresters, ARTICLE ARCHIVE Comments (0)

Once a decision is made to install a surge arrester of any particular type, the various design details that follow can prove challenging – as for example when it comes to ideal mounting arrangement or how best to deal with various line and earth lead...