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Issue 91                                                                                                             June 2015
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Des Burrows
The need for "adaptive expertise" in automation
by Des Burrows, Rascals Automation 
 
Students attending industrial automation product courses often don't know how to find and solve faults on integrated industrial automation systems. The problem is advances in smart production... (more) 
Thembani Buluka Response to Eskom application for 25,3% price increase
by Chris Yelland, investigative editor, EE Publishers

This submission is in response to Eskom's application on 30 April 2015 to NERSA for a "selective reopener" of NERSA's third multi-year price determination (MYPD 3), for the period 1 April 2015 to 30 March 2018... (more)
Rhys Evans
Maintaining a safe working environment
by Rhys Evans, ALCO-Safe
 
People are the most important asset of any organisation and all employees are entitled to the highest consideration for their safety while in the workplace. The OHS Act aims to provide a safe and healthy work environment for all... (more)

SA researchers demonstrate angular accelerating light
Information from the University of the Witwatersrand 

Light must travel in a straight line and at a constant speed, or so the laws of nature suggest. Now, researchers at the University of the Witwatersrand in Johannesburg have demonstrated that laser light traveling along a helical path through space can accelerate... (more) 
LED street lighting: the effect of maintenance factor on carbon footprint 
by Murray Cronjé, Beka Schréder

How the lighting engineer or designer can determine and apply the correct maintenance factor for LED lighting solutions to help prevent over-lighting. In conventional technology, the lamp manufacturer is responsible for the lamp lumen depreciation and the lamp survival factor... (more)

Simulating pressure rise in switchgear installation rooms
by Edgar Dullni, Pawel Wojcik and Tomasz Bleszynski, ABB
 
The pressure rise in a building can only be evaluated by calculation. These calculations should be substantiated by special tests allowing the measurement of external pressure rise. An internal arc fault is an unintentional discharge of electrical energy in switchgear... (more)

Selection of AC induction motors for cement plant applications
by Barton Sauer, Siemens
 
The selection of AC induction motors for cement mill applications with reference to fan, kiln and vertical mill applications. In cement plant, proper specification and supply of AC induction motors is critical to project schedules and providing efficient production... (more) 
How service-oriented drive deployments improve VSD driveline uptime 
by Philippe Hampikian, Schneider Electric
 
How the intelligence in variable speed drives can be leveraged to perform predictive maintenance and improve plant uptime. Variable speed drives (VSDs) were introduced to the market several years ago and have proliferated across many industries... (more) 
3D modelling - seeing the full picture
Information from Intergraph

With the general public exposed to 3D imagery on an ever increasing scale, it is not surprising that this has now become the standard for representing engineering data. Extended use of this data has increased dramatically with the imagery... (more)

Direct current for low-power households: a DC-DC converter analysis
by Christo Venter, Atanda Raji and Dr. Marco Adonis, CPUT

A design framework for the implementation of a DC powered house and the design and simulation of a household DC-DC converter. Over the last century, AC power has been the main type of power generated and used for residential purposes... (more) 
Information from Comtest 

Test leads are more than a means to connect your digital multimeter to the unit under test - they're an integral part of the complete measurement system. Poorly made, worn or under-rated test leads can cause inaccurate readings... (more) 
ECA(SA) news 
EE winning letter
Industry news 
Company, product, project & service news

Next generation electromechanical cylinder
Compact, strong hoist concept
Major contract at Maseve platinum mine
Machine automation controllers
Locally-designed rotating disc valvesAutomated drill improves safety and efficiency 
Digital pressure gauge for refrigeration systems
Combination transmitter no larger than a bee
Multiple-use touch sensorsHelping continuous miners reduce downtime