Industrial power quality standards

  Power quality becomes more and more important as energy efficiency equipment is brought into use in industrial networks, and as embedded generation is installed in distribution networks and own generation equipment is brought into use by industrial users. This article examines the standards for both utility networks and industrial users. All networks, however well […]

Top 10 ways to use GIS in retail banking

  This article describes key applications of geographic information systems that major banking corporations pursue at a head office level. The information is also applicable in most cases to other organisations operating a large number of retail outlets. It was not that long ago that I would be asked regularly at events focused on geographic […]

Tapping untapped renewable energy

  In water distribution networks in South Africa, water is often fed under gravity from a higher reservoir to another reservoir at a lower level. This provides an opportunity to generate renewable energy by passing the flow through a turbine. The high pressure head at the receiving reservoir is then dissipated through the control valves […]

Chandra X-ray observatory celebrates 15 years in space

  Fifteen years ago, NASA’s Chandra X-ray Observatory was launched into space aboard the space shuttle Columbia. Since its deployment on 23 July  1999 Chandra has helped revolutionise the understanding of the universe through its unrivalled X-ray vision. Chandra, along with the Hubble Space Telescope and Spitzer Space Telescope, is specially designed to detect X-ray […]

Twenty-first century distribution transformers

  William Stanley, working for Westinghouse is credited for building the first refined and commercially used transformer. In 1886 he used his transformers in the electrification of Great Barrington, Massachusetts, USA. This was the first ever implementation of an AC power distribution system using step up and step down transformers. Today, more than 120 years […]

Improving motor efficiency

  Some 20% of the estimated 65% of industrial energy used by electric motors is lost by wasteful throttling mechanisms, making it essential to reduce the energy appetite of motors. Energy consumption by electric motors can be reduced in two main ways – efficient control of the speed at which they run, and making the […]

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