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EE Publishers
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by Mark Botha, editor
The recent introduction of the e-toll system as part of the Gauteng Freeway Improvement Project is adding to the soaring cost of doing business in South Africa, and to the woes of the country's small business sector... (more)
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by Mark Botha, editor
Mario Maio, founder and owner of ACDC Dynamics, shares his views on skills development, the state of the SETA system and e-Tolls, among others... ( more)
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| Certificate of Compliance on a section of a premises
by Nico van den Berg, South African Institute of Occupational Safety and Health (SAIOSH)
What do you do when the client wants to sell a property and asks you to issue a CoC for only part of the premises? The reason for this is usually that the client doesn't have the money to fix up the whole premises... ( more) |
by Shantonette Pillay, ECA
There is no legal requirement which stipulates retirement age, but the age generally accepted for retirement is 60 0r 65 years. When it comes to retirement, there are four possible scenarios... (more)
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Dynamic, intelligent and flexible control for city lighting
by Daniel Gooijer, Philips Lighting Over the next few years, the global urban population is expected to grow by about 44-million people every year. 70% of these people are expected to live in cities by 2050, placing considerable strain on cities' lighting solutions... ( more) |
Vector Inbox March 2014
Letters to the editor
Our readers talk about temperature rise in minisubs; question the new VC9012 standard for luminaires; express general dissatisfaction with the new IEC164-6 plug and socket configuration, and comment on the state of the skilled labour force, among others... (more)
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General factors to consider in lighting design
by Thomas Bond, ACDC Dynamics
Lighting design for optimal light levels factors in location, the required illumination levels, working plane, lamp type, lumen output, mounting height and the required levels of uniformity... ( more) |
| Using daylight harvesting for sustainability
by Brent Protzman, Lutron Electronics
Daylighting is a relatively new term for an ancient practice. In the millennia before the introduction of electricity, buildings had to rely on available daylight to illuminate interior spaces. More recently, daylight harvesting became almost pass�... (more)
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| Industrial automation explained
by Gary Wilson, Siemens
A basic guide to how switchgear, instrumentation and variable speed drives integrate with software and control systems to create industrial automation... (more)
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| Unpacking the air circuit breaker - applications and development
by Paul Louw, ABB
The development and applications of LV electrical circuit breakers, from the post-World War II days to the incorporation of the de-ionisation chamber in circuit breaker design in the 1940s, and the development and applications of the air circuit breaker... ( more) |
Output control of a battery of centrifugal pumps
From the ICMEESA archive
A detailed investigation of a pumping system, its pump characteristics and surge pressures, for the adoption of a control system using flow as a criterion... (more)
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| Stresses due to lateral forces in tubular modular track
by Brendan van Schoor and Prof. Hannes Gr�be
The tubular modular track (TMT) system is a relatively new innovation in railway technology. It is a non-ballasted track structure which provides a more stable and reliable track system requiring less maintenance... ( more) |
Case study: waste granite recycled into cobblestones
Information from SEW Eurodrive
The winning entry in the PneuDrive Challenge 2013 engineering design competition came from the Cape Peninsula University of Technology (CPUT). It proposes the rehabilitation of abandoned granite mines by turning waste granite blocks into usable cobblestones... (more)
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| Benefits of simulation models for assessing energy savings on mine cooling systems
by Alistair Holman, Dr. Johann van Rensburg and Dr. Deon Arndt, CRCED Pretoria, North West University
At a time of immense economic pressure and fragile labour relations in South Africa, it is important for mines to be energy efficient, reduce energy costs, ensure safe working conditions and to minimise unwanted downsizing... ( more) |
Characteristics and performance of a CO2
trans-critical water to water heat pump by Paul Maina and Zhongjie Huan, Tshwane University of Technology
A study and findings on improvements in the efficiency of high-pressure carbon dioxide heat pumps by varying their various operational parameters ... (more) |
Company, product, project & service news
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