Unpacking the air circuit breaker – applications and development

by Paul Louw, ABB The development and applications of low voltage 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. Reconstruction after World War II resulted in the modernisation of industrial […]

Output control of a battery of centrifugal pumps

by C Dewar, 1974 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. Download PDF

Stresses due to lateral forces in tubular modular track

  by Brendan van Schoor and Prof. Hannes Gräbe 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. Download PDF

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. Download PDF  

Case study: Waste granite recycled into cobble stones

  Information from SEW Eurodrive A proposed design to rehabilitate abandoned granite mines creates low-skill employment and generates income. Download PDF

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. The word “automation” means to control an industrial machine or process without human intervention. In this article, we focus on factory and process automation. Factory automation In factory automation, field […]

Ambient LED lighting advances in tomorrow’s vehicles

  The advancement of ambient LED lighting solutions stems from the quest by automotive-OEM interior stylists to add value and make their vehicles more appealing while creating a truly positive driving experience and increasing brand awareness. Electronics is the fastest-growing sector of automotive content, over mechanical, pneumatics and hydraulics. With the increasing number of ambient […]

SA digital laser a world first

  by Hans van de Groenendaal, EE Publishers South African researchers have developed the world’s first digital laser, creating many new applications for laser technology Conventional laser devices commonly consist of mirrors, energy (light) and a casing containing a medium, for example crystal or glass. The medium changes the frequency of the light to create […]

Infrared LED technology for touchscreens

  The advent of high-efficiency infrared LEDs has made intuitive and robust touchscreens for various devices and controllers attractive to both industry and the end-user. Download the Pdf

Automatic energy optimisation for efficiency, precision system control

  Information from Danfoss Drive manufacturers have attempted to improve the low speed efficiency of motors, but most products require tedious manual adjustment. “Automatic energy optimisation” offers a solution. Download the Pdf