The independant power and energy journal of Southern Africa

Public lighting: Lighting the way to smart city development

Public lighting is one of the services most visually seen by the general public within a city (though it almost goes unnoticed). Lighting provides...

Choosing a variable frequency drive or soft starter

When accelerating an AC motor to full speed using a full voltage connection, a large inrush current may be required. Additionally, the torque of...

Prevention of bearing currents in large inverter driven electrical machines

While bearing currents have been around since the advent of electric motors, the incidence of damage they cause has increased with the advent of...

Machine learning solves grinding mill liner monitoring

To prevent ore from wearing out grinding mill drums, replaceable liners are inserted. ABB and Bern University of Applied Science have developed a liner...

Electrical current signature analysis for fault detection in large motors

Large electric motors form the core of many industries. As machines are designed to tighter tolerances, there is a growing need, for the sake...

The hybrid transformer: a solution for industrial network power quality

Industrial power quality (PQ) solutions generally consist of discrete devices to deal with individual problems. If more than one problem arises, more than one...

Measuring high currents with small current sensors

Modern current measurement trends in uninterruptible power supplies (UPS) and renewable energy systems is towards smaller physical size, higher current ranges, faster response times...

The impact of carbon tax on boiler energy efficiency

Energy efficiency has become a distinguishing factor when selecting a boiler for an industrial application but considering that manufacturers are only required to prove...

Energy management in industry: Can AI improve energy efficiency?

Energy savings and energy management are prime concerns of any industrial organisation.  There are many documented cases of industries achieving significant savings by adopting...

Power and water: Leliefontein pump-as-turbine station

Originally intended to be a booster station, Leliefontein’s location proved ideal for the establishment of a mini hydro-electric power station. The project, a marriage...
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