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Issue No 69                                                                                                   June 2013
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In this issue...
- Far East imports "no threat"; the danger lies within!
- MPRD Amendment Bill: "devastating consequences" for mining
- What exactly is the "SABS mark?"
- Dispute resolution in the built environment
- Dismissal of arrested or imprisoned employees: Part 2
- Vector Q&A
- Case study: LED installation affords UK food retailer 59% energy savings
- Driving the LED revolution
- A luminance model for evaluating colour rendering qualities of light sources
- Understanding short-circuit motor contribution
- Variable frequency drives: energy savings for pumping applications
- Situation awareness: vital for a "sentient" enterprise
- Thermal imagery to prevent pedestrian-vehicle collisions in mines
- Power quality degradation Part 2
- Performance of heat pumps in South Africa
- ECA news
- Industry News
- Company, product, project & service news
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Copyright 2013

EE Publishers (Pty) Ltd
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Mark Botha
Far East imports "no threat"; the danger lies within!
by Mark Botha, editor 

Delegates at recent IESSA conference heard that competition from lighting manufacturers in the Far East does not pose a real threat to the local industry. EE Publishers MD Chris Yelland said the real danger lies with South Africa's regulatory mechanisms which are failing us... (more) 
MPRD Amendment Bill: "devastating consequences" for mining
Information from Edward Nathan Sonnebergs

In the mining industry where huge capital is required to develop projects, companies' ability to raise funds on the stock exchange is crucial. The Mineral and Petroleum Resources Development Amendment Bill (2012) could, however, hamper South Africa's capital raising capability severely... (more) 
What exactly is the "SABS mark?"
by Verna Schutte, SABS

There is widespread confusion in industry about what the South African Bureau for Standards (SABS) "mark" means, how companies can attain the SABS mark, and the difference between terms such as "accreditation" and "certification"... (more)
Dispute resolution in the built environment
Information from property24.com

Disputes in the built environment are often complicated and involve issues at multiple levels, said Dr. John Fletcher, head of Dispute Resolution Services at the Royal Institution of Chartered Surveyors (RICS)... (more) 
Dismissal of arrested or imprisoned employees: Part 2
by Shantonette Naidoo, ECA 

Employees who have been found guilty in court, sentenced and imprisoned won't be able to work until they are released and may be dismissed for incapacity. Please note that you cannot just dismiss them for having a criminal record. You also cannot fire them for not being able to work as a result of their sentence... (more) 
Experts Q&A

How light fittings are to be positioned in compliance with the relevant standards; whether silicone sealant has a detrimental effect on cable insulation and whether an electrical shock to a worker was caused by static... (more) 
SRE
Case study: LED installation affords UK food retailer 59% energy savings
Information from GE Lighting

Food retailer Sainsbury's in Leek, Staffordshire, UK, needed a trusted, reliable solution that would provide high-quality lighting for its first-ever, all-LED supermarket. The shop in Leek subsequently became the first supermarket to use GE's Lumination Linear suspended luminaire... (more) 
Driving the LED revolution
by Henk Rotman, Philips Lighting 

Why drivers are needed for LEDs, their most important characteristics and their role in terms of influencing performance and lifetime. This article highlights how LED drivers offering operating windows are better equipped to deal with developments in the LED industry... (more) 
A luminance model for evaluating colour rendering qualities of light sources
by Prof. FW Leuschner and JGJ van der Westhuizen, University of Pretoria 

With the introduction of LED lighting, the lighting industry is faced with an infinite number of colour sources of light with numerous SPDs. The summation of SPDs can create even more diverse sources of light through combinations of these LED sources... (more) 
EE winning letter
Understanding short-circuit motor contribution
by Darrell Broussard, GE Industrial Solutions 

Motor contribution can be used to calculate maximum short circuit current and the short circuit rating of electrical equipment. It can be demonstrated that motor contribution is present during faults regardless of the size or voltage rating of the motor... (more) 
Variable frequency drives: energy savings for pumping applications
by Tom Neuberger and Steven B Weston, Eaton Corporation 

Variable frequence drives (VFDs) replaced motor generator sets and DC drives because of improved process performance and reduced maintenance costs. When the energy crisis occurred in the early 1970s, saving energy became a critical goal and the use of VFDs quickly spread... (more) 
Situation awareness: vital for a "sentient" enterprise
Information from Invensys
 
Situation awareness is one of the critical components of decision-making and highlights the importance of not wearing blinkers and focusing only on a narrow field of view... (more)
Thermal imagery to prevent pedestrian-vehicle collisions in mines 
by John Dickens, CSIR Centre for Mining Innovation
 
Approximately 20% of the mining industry's fatalities can be attributed to vehicle accidents. With new legislation imminent, collision avoidance systems for mine vehicles are poised to become an essential part of safety systems in mines... (more
Power quality degradation Part 2
by Philippe Feracci, Schneider Electric 
 
The methods for evaluating power quality (PQ), electromagnetic compatibility (EMC), and solutions for improving PQ. Corrective maintenance is generally the consequence of incidents or malfunctions during operation requiring troubleshooting to apply corrective measures... (more) 
Performance of heat pumps in South Africa
by M Zhang, Tshwane University of Technology

An analysis of the economics, thermal characteristics and development of heat pump water heaters in South Africa. Heat pump water heaters are recommended as sustainable and energy saving products. They save about 67% of electricity consumption... (more
ECA news 
Industry news

Company, product, project & service news