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Since 2006, RTE has been installing Aluminium Conductor Steel Supported (ACSS) type low-sag cables on the network. These steel-core conductors are covered by annealed trapezoidal-shaped aluminium wires, giving them superior power ampacity compared to conventional round wires conductors. Thanks to a lower coefficient of thermal expansion they can carry greater currents. However, if the conductor reaches...
There is an exponential growth in application of composite insulators during the last decade(s). They are especially popular for overhead line refurbishment and compact lines and these applications require higher demands on electric field grading. Two main criteria are used for the dimensioning of grading rings for composite insulators, the first one for the metal parts and the second for the housing...
Protection of live-line personnel against the possibly harmful effects of non-ionizing radiation — such as extra-low frequency electric and magnetic fields — is one of the keys of safe working. Limits of these fields are defined by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). Exposures above limits may endanger the safety of the workers, so are not acceptable during...
Amendments to the New Zealand health and safety at work legislation placed an increasing focus upon live work activities within the electricity transmission and distribution industry — particularly processes to be applied to reflect regulatory and legislative requirements to eliminate risks to health and safety, so far as reasonably practicable. While the New Zealand electricity supply industry has...
The international standards on live working published mainly by IEC or CENELEC TC 78 are used either in electrical systems and installations since number of years. They are regularly maintained and updated. The subject of this presentation is to underline the number of subjects covered already today from the basic training up to the final use. From each domain a list of standards with their official...
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