ABSTRACT
This chapter discusses various configurations for electro-optic high voltage sensing. Simple sensors derive the voltage from a local field measurement in the vicinity of the power line. Combined with a capacitive voltage divider, the sensors measure a small but well-defined fraction of the total voltage. Other sensors measure the voltage by line integration of the electric field. The power line voltage is longitudinally applied to single cylindric transducer crystal of appropriate crystal symmetry and orientation, or the voltage is approximated by a sum of several local field measurements along the integration path. Challenges are high voltage proof sensor packing and adequate field steering. Moreover, DC voltage sensors, integrated-optic and fiber-tip electric field sensors, and Kerr effect-based sensors are discussed.
