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Issue 90                                                                                                              May 2015
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Chris Yelland
To prepay or not to prepay Eskom - that is the question...
by Chris Yelland, EE Publishers 
 
Some questionable public statements made by Eskom's new acting CEO, Brian Molefe, make one wonder whether he is receiving sound information from his executive team... (more) 
Mark Mfikoe Legal certainty on merger of region A & B retirement funds
by Mark Mfikoe, ECA(SA)

The trustees of Regions A and B of the Electrical Contracting Industries Retirement Funds have decided to merge the Provident Fund and the Pension Fund into one retirement fund... (more)
Handbook: Guidelines for the safe use of standby generators
Forward by Sicelo Xulu, AMEU President
 
We hope that you will find this updated handbook useful and constructive to your standby /portable generation application for businesses and also at the household level... (download the handbook)
Mike Rycroft NERSA regulates small-scale renewables generation
by Mike Rycroft, EE Publishers

NERSA has issued a discussion document on small scale renewable embedded generation (SSREG) for discussion on a possible regulatory framework for this sector of the market... (more)
Dr. Clinton Carter-Brown
The impact of rooftop PV on distribution networks
by Dr. Clinton Carter-Brown, Aurecon
 
Many experts agree that a widespread proliferation of rooftop solar photovoltaic (PV) installations will take place, and is just a matter of time, given the opportunities presented by this technology... (more)
Domestic electricity prices:
Eskom vs. City Power
by Chris Yelland, investigative editor, EE Publishers
 
The City Power 60 A prepaid tariff offers the best pricing by far over the full range of electricity consumption up to 4000 kWh per month... (more)

How solid-state lighting can mitigate SA's electricity demand
by Henk Rotman, Philips Lighting SA

The opportunities offered by advances in LED technology in alleviating the current power supply problems facing South Africa. A major challenge facing South Africa at present is a renewed electricity shortage and the devastating impact this has on the economy... (more)
Surge protection concept for LED street lights 
Information from DEHN Protection SA

A well-conceived surge protection concept for LED lights should be incorporated at the design stage to ensure longevity and availability, and to avoid unnecessary maintenance. Street lights are currently being retrofitted in German communities and municipal utilities, often with LEDs... (more)
Questions you should ask your LED lighting supplier
Information from Genstar Lighting 

The upfront investment in LED technology is high but how do you know if the LEDs you are buying are of good quality or suitable for your installation? LED lighting offers many advantages such as energy efficiency, low maintenance, long life and ease of installation, to name a few... (more) 
Temperature measurement in generator circuit breakers
by Stephan Wildermuth, Ulf Ahrend, Moritz Hochlehnert and Marco Ulrich, ABB
 
The generator circuit breaker (GCB) is of great importance for the undisturbed operation of modern power plant. A new infrared sensor has been developed to measure temperature inside these circuit breakers... (more)
The importance of reliable control power 
by Dave Yakel, GE
 
Microprocessors have given today's power systems the potential to be more reliable, easier to maintain, and simpler to diagnose than ever before. While technology is rushing forward, the underlying implementation of an appropriate power system design is often lagging... (more) 
Improve your maintenance strategy with online condition monitoring
by Kamalina Srikant, National Instruments
 
Flexible and efficient operational systems are becoming more critical to meet changing electrical power demands as the country's power generation plant age. These plant require continuous production with minimal risk of disruption to meet these demands... (more) 
EE winning letter
Active and passive filtering techniques for harmonic mitigation
Information from CP Automation

In industry, voltage distortion caused by current harmonics can wreak havoc on plant, their equipment and the mains power supply. Damage can be serious and varied with the most common symptoms including voltage notching, motor vibration, arcing on bearings, nuisance tripping and others... (more) 
by Igor Glikin, Tolomatic 

How power screw drive and timing belts work; what materials are used; why each is suited for particular applications; what their critical aspects and parameters are, and how to select drive trains for reliability, efficiency and long life... (more) 
Automation assists water and energy efficiency
by Aimée Clarke, EE Publishers

The Amalgamated Beverage Industries (ABI) bottling plant has introduced automated processes and changes in production methods to use water and electricity more efficiently. Water and energy are becoming valuable resources and industries must manage their use... (more) 
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