Insulation Monitoring Devices (IMD)

Insulation monitoring devices (IMD) permanently monitor the insulation resistance to earth of unearthed IT systems.

Types of IMDs

a) Type AC IMD for pure a.c. IT systems,

b) Type AC /DC IMD for a.c. and d.c. systems,

c) Type DC IMD only for pure d.c. IT systems,

Document Type Version Application Date Current Version
Insulation Monitoring Devices (IMD) Requirement 0.0 2020-07-01 Yes
Insulation monitoring devices (IMD) Requirement 0.1 2020-07-01 No