ABSTRACT
This chapter discusses and illustrates application examples of fiber-optic current sensors and their benefits versus conventional solutions. The first example is a current sensor for electro-winning of metals by electrolysis, particularly of aluminum, where direct currents as high as 600 kA must be measured with errors below 0.1% in conductors with overall cross-sections up to several square meters. Next, the chapter illustrates how a three-phase sensor system is integrated into 420 kV circuit breakers for electric power transmission resulting in a significant footprint reduction. Other examples include remote current measurement at mixed overhead/underground powerlines and current measurement in plasma physics, e.g., at tokamaks for nuclear fusion research.
