Current Transformers for HV Protection Cahier Technique

This document, authored by Michel Orlhac and published as Cahier Technique Merlin Gerin n° 164, examines the operation of current transformers (CTs) in high-voltage protection applications, focusing on reducing CT dimensions and cost while expanding standard CT usage. It covers theoretical aspects like hysteresis and saturation, practical behavior of CTs in saturated states with symmetrical and asymmetrical currents, and parallel cubicle operation, supported by experimental results.