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Issue 93                                                                                                        August 2015
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Karel Steyn
Can a revived ESCO industry address SA's energy problems?
by Karel Steyn, SAEE president 
 
Many would like to believe that renewable energy is the only solution to the energy crisis and climate change. While renewables can obviously contribute substantially, would their potential contribution be greater than that of energy efficiency?... (more)
Stephen Khola The CCMA's interpretation of the "deeming provision"
by Stephen Khola, ECA

We have recently concluded a number of seminars conducted in the various provinces dealing with the Labour Relations Amendment Act and its potential impact on the electrical contracting industry... (more)
Municipal distributors: a wake-up call
by Dirk de Vos, QED Solutions
 
With load shedding and spiraling electricity prices now part of South Africans' lives, one could take the long view and see incorrect pricing as the cause of our electricity woes. Eskom's doubtful sustainability boils down to this single point... (more) 

Designing luminaires around 105°C solder temperature platforms
by Daniel Kasper, Beka-Schréder 

Designing luminaires around a solder temperature of 105°C with consideration for the effect of this temperature on the mechanical components of the lamp, and the effects on expected LED light depreciation... (more) 
Colour temperature and colour rendering of white LEDs 
by Elsie Coetzee, National Metrology Institute of South Africa

Optical measurement of white LEDs represents a major challenge due to factors such as operating temperature, burn-in phase and ageing, which affect lamps' emission performance. These changes also cause a change in colour appearance... (more) 
Finding a better protocol conversion solution between PLCs and devices
by Casper Yang and Edward Lin, Moxa
 
This article explores how industrial Ethernet gateways can be used to create easy-to-install communication gateways between VFDs and PLCs. Electric motor-driven systems collectively use more electricity than any other single application... (more)
Energy savings with pumping operations 
by Jakob Løchte, Grundfoss
 
Over pumps' lifetimes, their purchase price represents less than 10% of their total cost while maintenance and energy account for 15 and over 80% respectively. Pumps also account for over 20% of global electrical energy consumption... (more) 
Mixed technology switchgear saves space and time
by Mike Rycroft, features editor, EE Publishers
 
The need to extend or replace existing substation equipment, coupled with limitations on available space, has led to the development of mixed technology switchgear, which offers a reduction in space requirements and cost... (more) 
Case study: Re-engineered rotor enhances refinery compressor performance
by Claudia Proeger, Sulzer Management 
 
Large centrifugal impeller compressors are commonplace throughout the petrochemical sector where they usually operate on a continuous duty basis. A scheduled maintenance task at a German refinery revealed the need for a new rotor assembly... (more)
Single-phase UPS management, maintenance and lifecycle
by Justin Solis, Schneider Electric

Simple preventive maintenance should be performed on a regular basis to keep your UPS operating at maximum efficiency. In the past, it was difficult to test and monitor UPSs. New designs, however, simplify matters for the user... (more) 
by Regan Brown and David Brown, Fluke 

Moisture damage in residential and commercial buildings can be very expensive and the key is to identify and locate problems before secondary damage escalates. Infrared cameras are powerful tools for locating moisture problems... (more) 
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