Residual current devices in LV

Today, residual current devices (RCD) are recognised as the most effective means of protecting life and property against electrical hazards in low voltage systems. Their selection and optimum use require sound knowledge of the principles and rules governing electrical installations and in particular system earthing arrangements as well as existing technologies and their performance levels. All these aspects are dealt with in this "Cahier Technique", with in addition numerous answers provided by Schneider Electric technical and maintenance departments to frequently asked questions.