September 2005
ABB has launched the world's first multi-level, fuseless, medium voltage ac drive for standard motors up to 6,9 kV. The ACS 5000 drive, rated from 5 to 24 MW, is suitable for standard industrial asynchronous and synchronous motors. The ACS 5000 invertert unit combines several proven ABB technologies that achieve unprecedented levels of efficiency, reliability, performance and size. See page 23.
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Drives, Motor Control, Protection and Switchgear
Alternative method of squirrel cage rotor design and replacement
C D Pitis (Femco Mining Motors) ,
It is possible to replace a rotor with a fabricated alternative
An overview of motor starting using solid state reduced voltage starters
R Annandale (Saftronics) ,
It's the start-up that is critical
Energy efficient use of motors and drives on pumps
J van Niekerk (Zest Electric Motors and Drives) ,
There is huge opportunity to save
Benefits of replacing a fixed speed drive with a VSD in a reheat furnace combustion air fan application
B Schmitt (Siemens) ,
Savings just blowing in the wind
Plant Maintenance and Refurbishment
Alarm management strategies - an introduction
L O'Brien and D Woll (ARC Advisory Group) ,
It's alarming how many alarms we have
South Africa's DSM program: a savings opportunity
T Nortje (Eskom Demand Side Management) ,
Get on board and save
The application of passive spectral monitoring in the infrared range at industrial sites
J Mulder and N van der Merwe (Spero Group) ,
Seeing it all from a distance
PLCs, SCADA and Industrial Communications
Modular automation: productivity growth for machines and systems
T Behr (Phoenix Contact, Germany) ,
Keeping production costs down, without compromising quality
What to look out for when planning for total control and automation
A Kerr (Shorrock Automation) ,
A case for single source supplying
Where there is smoke, there is ..?
WJ Steenberg (Freelance Senior Instrumentation Engineer) ,
Earth is not only a requirement for landing purposes
Sensors, Switches and Transducers
Vision sensors come into view
R Topham (RET Automation Controls) ,
To see or not to see
Performance evaluation of a novel integrated current sensor in high power isolated power converters
DC Pentz and IW Hofsajer (University of Johannesburg) ,
Current limiting and protection of the bridge circuit
