Overview
Insulation Monitoring Relay
An Insulation Monitoring Relay (IMR) is a protective device used to monitor the insulation resistance of ungrounded (IT) power systems. It continuously measures insulation resistance between active conductors and earth, providing early detection of insulation faults. By alerting operators before a complete breakdown occurs, insulation monitoring relays help prevent electrical shocks, equipment failures, and costly downtime. They are essential in applications where continuous operation and high safety standards are critical.
IMRs provide real-time monitoring of insulation resistance, detecting faults early and ensuring safer electrical operation.
By identifying insulation degradation before breakdown, IMRs reduce the risk of electric shock, fire, or equipment damage.
With preventive monitoring, operators can perform corrective maintenance before faults escalate, minimizing downtime.
Benefits
- Monitors insulation resistance of unearthed IT Systems in compliance with IEC 61557-8, EN 50155, IEC 61373 and EN 45545 HL-2/3
- Suitable for monitoring 1 Ph, 3P3W and 3P4W unearthed supply systems
- Measuring input L-PE with line voltages upto 520V AC
- Wide auxiliary supply voltage range 24V – 240V AC/DC
- Adjustable trip resistance value from 1K to 100Kohm
- 2 Relay outputs (1C/O + 1NO) for fail safe and non fail safe operation
- Test / Reset function with Manual and remote facility
- Configurable Auto / Manual Reset
- LED indication for insulation fault, Power and Relay output
- DIN Rail / Base Mounting