1 Scope
This document explains the setting parameters of insulation monitoring devices (IMDs) and how to interpret these measurements through plotted curves. Some examples of injection methods are also proposed.
NOTE 1 Requirements for IMDs are specified by IEC 61557‑8.
The examples given in this document consider the situation of an insulation fault in an installation or equipment (motors, enclosure, cables, etc.) creating a resistive path to earth and calculate the touch voltage. It does not consider a person making direct contact with a live conductor in an IT grid.
NOTE 2 This document is informative and cannot contain requirements, in accordance with the ISO/IEC Directives, Part 2, for technical reports.