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 and lower cost. The simplicity of open-loop sensors makes them an attractive solution for attaining these objectives. This article discusses three new families of sensors which allow the nominal current to […]

Managing and operating solar assets: Five key considerations

PV was supposed to be like any other energy source: You invest in the infrastructure and then it pretty much runs itself from thereon. But US solar asset owners have found that is not the case. The landscape for PV operations keeps changing. This article discusses five trends which could have a material impact on […]

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 between the civil, mechanical and electrical engineering disciplines, shows how municipalities can use low cost, off the shelf equipment to generate clean power in their existing infrastructure. Wellington is home to […]

Deadly air: How Eskom’s coal-fired power stations are killing people

Eskom’s reliance on coal for electricity generation is proving to be deadly. According to new NASA satellite data analysis, Mpumalanga is the second worst SO2 emission hotspot in the world, beaten only by Russia’s enormous  smelters. This is due to the density of coal-fired power plants there. Although experts in medical research say that high […]