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The lighting industry and the cycle of change
by Henk Rotman, Philips Lighting SA
The "four rooms of change" theory by Claes Janssen describes an ongoing cycle where employees move between different states of mind, referred to as "rooms". This theory has parallels in the lighting industry today... ( more)
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 Bargaining council takes back the industry
by Mark Mfikoe, ECA(SA)
At last there is light at the end of the tunnel for South Africa's legitimate electrical contractors. "Pirate" contractors have been taking work from legitimate contractors, but the NBCEISA is "taking back" the industry... (more)
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 What does the future hold for South African manufacturing?
by Mark Botha, editor
A discussion on the future of manufacturing in South Africa has heard that government has not pursued solutions sufficiently to enable the country to achieve its manufacturing potential, leading to the loss of 300 000 jobs... ( more)
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ECA(SA) Presidential Excellence Awards 2014 winners announced
The 2014 ECA(SA) Presidential Excellence Awards banquet and National Golf Day was hosted at Johannesburg's Ruimsig Golf Club on 20 November 2014 by the ECA in association with Vector magazine, and was a huge success. See the winners and photos here.
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Vector Inbox
Our readers comment on the article, "Certificates of Compliance: the role of the conveyance attorney" (Vector, October 2014), which focuses on the purchase and sale of fixed property... (more)
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The Labour Relations Amendment Act and fixed-term employment contracts
by Stephen Khola, ECA(SA)
The Labour Relations Amendment Act of 2004 ensures that labour legislation gives effect to fundamental constitutional rights, including the right to fair labour practices, to engage in collective bargaining and the right to equality and protection from discrimination... (more)
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by Louis Pretorius, ECA(SA)
When selling or buying a property, knowing one's rights and obligations can be a very confusing matter, but not a difficult one. You only need to speak to the right people and to use a reputable, registered electrical contractor... (more)
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What is derivative misconduct?
by Shantonette Pillay, ECA(SA)
The term "derivative misconduct" refers to a group of employees who won't help their employer identify the parties to misconduct. When they don't assist the employer, they are deemed to associate themselves with the perpetrators... (more)
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Information from Osram Opto Semiconductors
The single requirement that devices should not fail is no longer sufficient for modern, powerful components or devices. More often, it is an additional requirement that they should perform their functions without failure... (more)
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An improved approach for connecting VSDs and electric motors
by Heu Vang and Marco Chiari, Schneider Electric
Motor winding insulation can deteriorate quickly and motors may fail when variable speed drives (VSDs) are connected to them by long cable lengths. Within the VSD, AC supply voltage is converted into DC by means of a rectifier... (more)
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| Electrical, insulation and thermal measurements for motors and drives
Information from Comtest
Electrical, insulation resistance and thermal measurement can troubleshoot motors, drives and associated electrical panels. Used together, thermal imagers can detect potential problems while electrical tests can determine the cause... (more)
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by Mike Sherman, RMI Pressure Systems
Pump designs fall mainly into two categories, centrifugal and reciprocating (piston) type, each with its own benefits and constraints. This article explores the design criteria and some of the applications... ( more) |
| Fundamentals of laser welding
Information from Unitek Miyachi Corporation
There are two types of neodymium-doped yttrium aluminium garnet (Nd:YAG) laser welder, continuous and pulsed wave. As the name suggests, continuous wave or CW is either on or off, whereas pulsed lasers create welds by individual pulses... ( more) |
Lightning and surge protection for rooftop PV systems
Information from DEHN Protection
If surges are injected into systems which are far from the power grid, also referred to as stand-alone PV systems, the operation of equipment powered by solar electricity such as medical equipment and water supply may be disrupted... (more)
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With the global emergence of building automation, the powerful supervisory facilities and control of DALI-based emergency lighting systems in building designs and renovations are now too obvious to ignore... (more)
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Preventing system failure in solar PV systems Information from the Copper Development Association Africa
It is vital for solar photovoltaic (PV) systems to accommodate the temperature fluctuations and environmental conditions to which they are typically exposed as these conditions often cause ongoing system failure... (more)
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Company, product, project & service news
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