High current DC fibre-optic measurement system

27 July 2005 Test & Measurement Products & Solutions

DynAmp, formerly LEM DynAmp of the US, has released its fully-compensated fibre-optic high current DC measurement system, the LKCO. Representing a significant breakthrough in high current measurement, advanced optical technology senses the phase shift in light caused by the magnetic field from the bus current when it is routed round a current-carrying bus via fibre-optics.

LKCO uses a unique, patented 'fully compensated' closed-loop system, developed over eight years of lab and field experience to ensure long-term performance. Putting the entire system (light source, opto-electronics, fibre-optics and measurement output signals) under complete closed loop control, any sensitivity, gain, drift or zero point change is automatically compensated for.

This measurement system is particularly well suited to measure process bus currents in electro-chemical and industrial processes including aluminium, chlorine, copper, manganese, titanium and zinc for process efficiency and control purposes. It is capable of measuring up to 500 kA with a measurement accuracy of 0,1% of measurement and linearity. Repeatability is ±0,01%.

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