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INMR
World's leading technical journal in the field of electrical insulators, surge arresters, bushings and cable accessories
World's leading technical journal in the field of electrical insulators, surge arresters, bushings and cable accessories
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It is already well known that composite insulators used at transmission voltages have to be equipped with corona rings to reduce the risk of severe erosion to their polymeric housings. Yet, there are still cases where such insulators are either installed without rings or where the rings become detached and fall off due to factors such as conductor vibration or improper installation.
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Should we use an AC or DC Hipot, or dielectric tester, to assess the condition of a surge arrester?
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What’s Next After Succession of Different Arrester ‘Eras’?
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Dielectric frequency response or DFR, (also known as Frequency Domain Spectroscopy or FDS), was introduced more than 20 years ago and has been evaluated in a number of research projects and field tests, usually with good results. This article provides a background on DFR as well as on insulation modeling.
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Describing methods to assess terminations used on cables with extruded insulation and which are the interfaces to other components of the power grid. These can be classified into indoor terminations for connection with transformers and gas-insulated switchgear or outdoor terminations for connection to an overhead line or switchyard.
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Insight into development of unique 400 kV double circuit transmission lines across the U.K.
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CIGRE Technical Brochure (TB 442) describes a variety of test methods to quantify retention of hydrophobicity under simultaneous electrical and electrolytic stress and also hydrophobicity recovery and transfer.
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Reviewing basics of testing bushings & certain case histories investigating cause of failure.
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Reviewing some of the specifics of the IR inspection process
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