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Bushings

Proactive Bushing Fleet Management

August 19, 2017 • ARTICLE ARCHIVE, BushingsComments Off on Proactive Bushing Fleet Management

Bushings are highly reliable components. However, if failed, the typical result is extended downtime of a power transformer with not only heavy financial losses but also challenges imposed on the system operator to compensate for the lost unit. Since the premature breakdown of any bushing is especially undesirable, it is important to do whatever possible ...

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Optimizing Safety of HV & UHV Bushings

August 5, 2017 • ARTICLE ARCHIVE, Bushings

Safety is an important factor in the power industry due to the consequences and risks of injury from catastrophic failures of electrical equipment. This aspect must therefore always be taken into account during design – even at the inception of product...

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Diagnostic Measurement & Monitoring of HV Bushings

June 3, 2017 • ARTICLE ARCHIVE, Bushings

Measurement of capacitance and dielectric dissipation factor (power factor) is a proven diagnostic to assess the condition of high voltage bushings. In the past, dielectric response measurements in the frequency domain with frequency domain spectroscopy (FDS)...

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Program of Pollution Countermeasures Paid Off at Key Transmission Substation

May 27, 2017 • ARTICLE ARCHIVE, Bushings, Utility Practice & Experience

In the early 2000s, an important substation supplying power to a cluster of process-based industries in Canada recorded a decade without unplanned outages. While this may not seem so extraordinary, what makes the achievement remarkable is that during the...

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RIS Bushing Technology: Reliability Testing & Field Experience

May 13, 2017 • ARTICLE ARCHIVE, Bushings

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...

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Experience with Mold Growth on Silicone Bushings

May 6, 2017 • ARTICLE ARCHIVE, Bushings, Silicone & Other Materials

With the dramatic growth in application of composite insulators, there have been periodic reports concerning mold growth and its possible impact on electrical performance. Users will therefore need to know what is the best course of action to follow should...

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Bushings Technology Review: Current Designs & Future Tendencies

April 22, 2017 • ARTICLE ARCHIVE, Bushings

Bushings are devices that allow high voltage conductors to pass through the earthed walls of transformers, switchgear and substation structures. An integral part of this function involves meeting all the electrical, thermal and mechanical requirements of the...

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Repairing RTV Coated Insulators & Composite-Housed Bushings

April 15, 2017 • ARTICLE ARCHIVE, Bushings, Insulators

Silicone rubber has been applied for decades as an insulation material for high voltage equipment because of its lower weight and lasting hydrophobicity. However, silicone’s resistance to weathering is weaker than that of traditional ceramic insulating...

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