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Issue No 73                                                                                                October 2013
In this issue...
- Ex equipment: affordable safety
- New luminary for lighting industry
- Proposed changes to the Collective Agreement
- Experts Q&A
- Electronic lighting ballast survival testing
- LED tube retrofits for fluorescent office lighting
- The influence of VSDs on electric motor operating temperatures
- Generator circuit breakers have special requirements for generator protection
- Making sound choices when specifying hour meters
- Energy management challenges in pumping station automation
- The effect of compressed air pressure on mining production and energy demand
- The design and application of ash handling pumps
- ECA News
- Industry news
- Company, product, project & service news
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 Published by

 

EE Publishers

 

P O Box 458
Muldersdrift
1747
South Africa

 

Tel: 011 543 7000
Fax: 011 543 7025

 

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 Copyright

Copyright 2013

EE Publishers (Pty) Ltd
All rights reserved
  

  
Johannes Auret Ex equipment: affordable safety
by Dr. Johannes Auret, Explolabs Consulting 
 
Safety is generally considered expensive although, in theory, a higher product compliance level should result in savings. Real savings can be achieved with proper planning... (more)
Carl Watson
New luminary for lighting industry
by Mark Botha, editor

New Beka MD Carl Watson speaks to Vector about, among others, his immediate priorities, today's drivers in the lighting industry, the effects of the recession and the lack of understanding of LEDs... (more)
Proposed changes to the Collective Agreement
Information from ECA(SA)

The South African Equity Workers' Association (SAEWA) has demanded a number of changes to the Collective Agreement of the National Bargaining Council for the Electrical Industry of South Africa (NBCEISA)... (more) 

Experts Q&A
Answers from our experts

Explolabs and Certex director and explosion prevention specialist Dr. Johannes Auret answers questions on explosion protected (Ex) equipment, its use, certification and regulation, among others... (more) 
Electronic lighting ballast survival testing
Information from GE Digital Energy
  
A study to review the effects of exposing energy efficient lighting systems to transient surges which may occur at typical installations within facilities... (more)
LED tube retrofits for fluorescent office lighting
by Prof. Ernst Uken et al, Cape Peninsula University of Technology
  
Two case studies show the feasibility of retrofitting LED tubes to replace fluorescent lights in single offices, as well as in suites of offices... (more) 
SRE
The influence of VSDs on electric motor operating temperatures
by CJR Kriel et al, HVAC International, TEMM International, North-West University

The use of VSDs on electric motors can have negative effects on motors' life, depending on the application and cause harmonics, voltage spikes and operating temperature increases... (more)
Generator circuit breakers have special requirements for generator protection
by William Long, R Kirkland Smith and Stephen Cary, Eaton

The unique demands of protecting generator circuits and the different requirements for generator and standard distribution circuit breakers... (more) 
Making the right choices when specifying hour meters
Information from Honeywell

Hour meters may provide the most inexpensive source of "equipment reliability insurance" manufacturers can offer with their products. Here are some guidelines for making sound choices when specifying hour meters... (more) 
EE winning letter
Energy management challenges in pumping station automation
by Dr. GD Bolt et al, CRED, North-West University, TEMM International and HVAC International

The technical and control philosophy challenges faced in the automation of a water transfer pumping station... (more) 
The effect of compressed air pressure on mining production and energy demand
by SJ Bester & D le Roux, BBE Energy, & D Adams, Impala Platinum 
 
An investigation into the possible reasons for the decrease in productivity of underground pneumatic rock drills... (more) 
The design and application of ash handling pumps
by WA Clennell, 1958, From the ICMEESA archive

Special ash pumps are used to dispose of the ash from large power stations. This article from the ICMEESA archive reviews the development of these and discusses special design features and limitations of this equipment... (more) 
ECA News
 
Industry news 

Company, product, project & service news