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Issue 100                                                                                                        April 2016
In this issue...
- Ongoing innovation the hallmark of automation
- Managing discipline in the workplace: Part 3
- "Act of madness" precipitates civil unrest in Zandspruit
- Warm start emergency fluorescent lighting
- How to measure thermal resistance of LED emitters and LED arrays
- The problem of overheating inside LV switchboards
- Electrical machine vibration: causes and control
- Plants based on the "Lego principle": Modular automation with valve terminals
- Mine hoist parts inspection averts disaster
- Guidelines for safe installation and maintenance of MV equipment
- Notes on a winding rope subjected to shock loads
- Arc flash data collection and system modelling
- ECA(SA) news
- Project Pinboard
- Industry news
- Company, product, project & service news

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EE Publishers

 

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Kenneth McPherson Ongoing innovation the hallmark of automation
by Kenneth McPherson, Beckhoff Automation

According to the German Research Centre for Artificial Intelligence, the first industrial revolution occurred during the 18th century when the first mechanical production machines were driven by water or steam... (more)
Stephen Khola Managing discipline in the workplace: Part 3
by Stephen Khola, ECA(SA)

This is a continuation of our series on the management of discipline in the workplace. In this edition, we continue with the necessary steps preceding the implementation of... (more)
Aimee Clarke "Act of madness" precipitates civil unrest
by Aim�e Clarke, EE Publishers

The past month has seen violent service delivery protests, burning tyres, destruction to property, road closures and looting in Johannesburg's Zandspruit township. This seething civil unrest was precipitated by a heavy-handed action by Eskom... (more)
Warm start emergency fluorescent lighting
by Ryan Marais and Stirling Marais, Cosine Developments

Emergency lighting cycles without electrode heating before lamp ignition usually damage fluorescent lamps. Emergency lighting cycles usually damage fluorescent lamps as most emergency gear does not provide a programmed electrode heating cycle before lamp ignition... (more)
How to measure thermal resistance of LED emitters and LED arrays
Information from Philips Lumileds

A description of the process used to determine typical thermal resistance values from LED junction to case and LED junction to Ts reference point. Thermal performance is the most critical factor of a well-designed LED lighting system... (more)
The problem of overheating inside LV switchboards
Information from ABB

Calculating the maximum continuous current which circuit breakers can carry without incurring damage can make it difficult to specify circuit breakers for assemblies. An electrical switchboard is a combination of protection and switching devices assembled in one or more... (more)
Electrical machine vibration: causes and control
by Mike Rycroft, EE Publishers

This article discusses the causes of electrical machine vibration, the effects of vibration and means taken to mitigate it. All rotating machines exhibit vibration of some form when operating. Excessive vibration can cause damage to the machine... (more)
Plants based on the "Lego principle": Modular automation with valve terminals
by Norbert Franz, Festo

Process industries must produce smaller batches of different product from the same plant, making the "Lego principle" an essential building block. At present, the design and engineering of process plants is tailored precisely to the task, whether for the production of a specific... (more)
Mine hoist parts inspection averts disaster
by FA Cotton, 1973

From the ICMEESA archive This article presents a case study illustrating the importance of regular examination of winder brake parts in mine hoists. Pins associated with the brake gear of a mine hoist, from the point of strength, are designed very generously. Bearing pressures... (more)
EE winning letter
Guidelines for safe installation and maintenance of MV equipment
by Didier Fulchiron, Schneider Electric

Implementing safety best practices for MV equipment early in the installation cycle reduces the potential of future faults, equipment failure and a reduction on investment returns. Safety or risk analyses should highlight a sequence of events that will reveal possible risk... (more)
Notes on a winding rope subjected to shock loads
by EA Johns, 1973

A case study stressing the importance of taking accurate measurements of the length of lay during monthly rope examination. From the ICMEESA archive While hoisting rock, a manually operated Ward Leonard type direct coupled electric hoist tripped out on overload at full... (more)
Arc flash data collection and system modelling
by Robert Randela, EHL Consulting Engineers

Field data collection and arc flash system modelling requirements to determine the arc flash potential incident energy levels and arc flash boundaries for the safety of personnel and at the work place. Electrical faults can occur due to failed insulation, accidental contact... (more)
ECA(SA) news
Project Pinboard
Compiled by Aimee Clarke, EE Publishers
  • Leratong City integrated nodal development
  • Phase two of MyCiTi gets the go-ahead
  • One of the largest data centres in Africa
  • Mall of Africa opens
  • Namibia Roads Authority engages SADC partners
  • Durban may get tallest building in hemisphere... (more)
Industry news
Company, product, project & service news