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 | No |
| Insulation monitoring devices (IMD) | Requirement | 0.1 | 2020-07-01 | No |
| Insulation Monitoring Devices (IMD) | Requirement | 0.2 | 2022-07-01 | No |
| Insulation Monitoring Devices (IMD) | Requirement | 0.3 | 2023-07-01 | Yes |