June 2011
We're well into June and (at time of writing) there have been no major electricity outages... for which we are extremely relieved! The trend will continue, no doubt, as will our positive thinking! This month we have interesting examples of how to curb cable and copper theft - we are slowly starting to see an improvement in dealing with a crime that literally leaves us powerless.
There are three safety-related articles - we have a case study on the improvement of fire detection systems; you can read about electrical arc flash energy calculations to make working in various types of plant safer; and you will learn that nucleonic measurement is becoming safer with new developments. An article on plant-wide optimisation discusses a concept that should define everything we do - whether in the plant, the substation, the factory and even in the home and office. ... and we look at the electric charger for vehicles - we should be charging when we stop and not stopping to charge!
Everyone has spoken highly of the Process Expo held at Nasrec in May. We were there... so turn to our Process Product Parade as well as Social Engineers and you will see that our cameras did their fair share of clicking!
Stay warm in June!
Wendy Izgorsek Editor, Electricity+Control Tel. 011 622 4770
| This issue of Electricity + Control is available for interactive "page-flip" viewing. You'll need the latest Flash Plugin, and an ADSL or 3G internet connection to view the magazine smoothly. | You need to register with Crown Publications to read the online version of this magazine. | | LoginRegister | We have them taped 10 million metres ahead in cable theft prevention with CBiD By K Leeburn, CBi-electric: African cables Electric cable theft is a scourge that is costing the South African economy billions of rand each year. As a consequence of cable theft, many consumers experience power interruptions or are left without power for several hours when utilities have to replace stolen sections of the circuit. CBiD is the solution! Bimetallic conductors... solution to copper theft By D Thorpe, Exoweld Copper is used in many ways in our modern world, from the delicate wiring of vehicles to grounding of substations. Thieves target both the stocks kept on site by manufacturers and the finished product once installed, however, the implications of the theft are not just confined to the high replacement costs, or potential power outages and train stoppages. Over the years research has been undertaken to offer an alternative product to solid copper and this has led to the development of bimetallic conductors. Fire detector coverage mapping for improving existing systems By E Marszal, Kenexis This article presents a case study of the analysis of an existing fire detector system in the Gulf of Mexico. The analysis demonstrated that better coverage could be obtained using fewer detectors, allowing the design to be changed which can result in significantly lowering maintenance costs while improving safety. Electrical arc flash energy calculations By Z Jooma (Pr. Eng), e-Hazard The methods used to calculate arc flash energies, incident upon the worker, have received a mixed bag of reaction from industry. Some purists refuse to acknowledge the methods used, while those who wish to do something instead of nothing have adopted these methods. This article discusses the only published calculation guideline and limited critique via publications and experimental data. Streamline operations through plant-wide optimisation Rockwell Automation Stakeholders in the manufacturing industry, including suppliers, machine builders and users, strive for continuous advancement over what came before. Increasing productivity is a key goal, but manufacturers must focus on fine-tuning best practices by holistically perfecting the use of people, processes and technology through plant-wide optimisation. Gamma rays... no fear! New developments make nucleonic measurement safer and more reliable By R Bonath, VEGA Nucleonic gauges can be found everywhere where extreme conditions would mean the end for any other measurement technology. This is because nucleonic devices measure 'contactlessly', which makes the measuring systems wear free and practically maintenance free as well. However, since this technology uses radioactive radiation, safety is the top priority. New developments provide not only improved radiation protection, but also optimised process reliability. Connection system on the recharging spot - a key element for electric vehicles By C Ricaud and P Vollet, Schneider Electric Using an electric vehicle on a regular basis requires safe and easy-to-use charging installations. These charging infrastructures should allow the user to charge the vehicle whenever a stop is made (home, workplace, malls, car parks, etc) and should not require stopping just to charge: the concept of electric vehicle charging is charging when we stop and not stopping to charge, unlike thermal vehicles!
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