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Issue 92 July 2015

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EE Publishers

P O Box 458

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1747

South Africa

Tel: 011 543 7000

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Could banning copper exports be the solution?

by Mark Botha, editor

The SA Chamber of Commerce and Industry (SACCI) Copper Theft Barometer reported cable theft from Eskom, Telkom and Transnet alone in April this year to the value of R13,6-million... (more)

Contractor registration: the impact of Regulation 6
by Mark Mfikoe, ECA

This discussion focuses on the EIR published on 6 March 2009 and their implications for safety as the DoL is considering submissions with a view to a revision of the regulations... (more)

Do engineers have the key to solve SA's energy crisis?

by Paul Fitzsimons, GIBB Consulting Engineers

As the power and energy debate in South Africa continues to draw attention from world-wide players and sparks contest between industries seeking solutions, we should look to the past to determine our future... (more)

LED emergency lighting: solving the operating temperature problem

by Stirling Marais, Cosine Developments and Kurt Isele, Lightnet

Heat rise inside bulkhead-type fluorescent emergency light fittings will age the batteries prematurely and, in serious cases, damage the emergency gear itself. The worst offenders here are switch-start CFLs due to the electromagnetic ballast dissipation... (more)

Mercury treatment techniques for compact fluorescent lamps

by Lerato Lethea and Andr� Blignaut, Eskom

Capturing mercury from broken compact fluorescent lamps: sample selection, photometric data analysis and the test methods of the chosen treatment techniques. The replacement of incandescent lamps with CFLs was identified as an effective approach for energy savings... (more)

Understanding LED technology
Information from Vossloh-Schwabe

The advantages of LED technology are numerous, yet patchy knowledge of the underlying technology often leads to indecisiveness and even incorrect decisions. An LED is a semiconductor component that only lets current pass in one direction... (more)

Pneumatic motor - the ideal drive for winding processes

Information from Dowson & Dobson Industrial

The operating speed of pneumatic motors can be regulated by altering air or operating pressure, enabling these motors to provide drive solutions for winding processes. Winding drives can be found in many production processes... (more)

Synchronous motors: motor design simplified

by Heinz Lendenmann, Reza Moghaddam, Ari Tammi, and
Lars-Erik Thand, ABB

Synchronous motors controlled by variable-speed drives are bringing higher efficiencies to industrial applications. Using energy effectively by increasing motor efficiency is at the centre of continued motor optimisation... (more)

Improving soft starters' transient immunity

by Delcho Penkov and Alain C�te, Schneider Electric

The damaging role of current transient in soft-starters in field applications, the major causes of current transient and a simple tool for designing thyristor protection... (more)

Packaged pump systems and variable flow pressure boosting

by Brian James and Roger Weldon, Grundfos

Packaged pump systems are a compact, space-saving configuration offering easy installation, single source responsibility and advanced control options with communication abilities. Packaged pump systems are assemblies of pumping components for systems wired, piped or mounted on a base... (more)

Cost savings on mine dewatering pumps by reducing preparation, comeback loads

by C Cilliers, L van der Zee and M Kleingeld, North-West University

To enable load shifting on mine dewatering pumps, preparation before and recovery after peak time-of-use is needed for effective results. DSM projects on the industrial and mining sectors fall into three categories: energy efficiency, peak clip and load shifting projects... (more)

Maintaining precision in varying temperatures

by Michel Ghilardi, LEM, and Horst Bezold, Signaltec

High-precision transducers are becoming more in demand in high-performance industrial applications. Most of these applications use high-precision transducers but with a limited temperature range of 10 to 50�C... (more)

Zero net-energy buildings

by Mike Rycroft, EE Publishers

The concept of self sustaining or self powering buildings has become the holy grail of the green building sector, and there are an increasing number of buildings claiming zero net-energy usage worldwide. Many countries have set targets for ZNEB in the future. The concept however is not clearly defined... (more)

ECA(SA) news

Registration of electrical contractors: the impact of Regulation 6 Questions on fixed-term contract of employment

Escalation versus contract price adjustment

Certificate of Compliance Part III: How?

ECA Cape Town annual charity golf day

Your employees and questions about money

Joe and the legal side of CoC

Is it worth opposing condonation applications in labour disputes?

Toets 'n bakkie: Ford Transit Connect

Industry news

GCC masterclass hosted

Engineering council addresses service delivery challenges