Schneider Electric’s Vigilohm IM400 insulation monitoring device is your best choice for protecting large and complex power grids. It can not only effectively prevent insulation failures, but also improve the reliability and safety of the system.
Feaure of Schneider IMD Vigilohm IM400
- Adaptative multifrequency measuring signal, for AC, DC and AC/DC networks.
- Power supply: 100-440 VACDC, and 24-48VDC (IM400L).
- Measures the insulation resistance from 10 Ω to 10 MΩ.
- Measures earth leakage capacitance from 0.1 to 500µF or 5500µF (IM400C).
- 1 settable alarm and 1 settable pre-alarm thresholds.
- Large screen, event log and historical data.
- Native Modbus RS485 communication port.
- Conformally coated (IM400C).
Specification of Schneider IMD Vigilohm IM400
| Specification | Parameters |
| Network rated voltage | 0…480 V – AC at 45…440 Hz (device connected to phase) |
| 0…830 V – AC at 45…440 Hz (device connected to neutral) | |
| 0…480 V – DC | |
| Type of measurement | Network insulation resistance – measurement range: 10 Ohm…10 MOhm |
| Earth leakage capacitance – measurement range: 0.1…500 µF | |
| Local signalling | Green indicator light: satisfactory insulation resistance |
| White indicator light: below prevention threshold | |
| Red indicator light: wiring or internal fault | |
| Yellow indicator light: insulation fault | |
| Yellow flashing indicator light: communication | |
| Threshold setting | Pre-alarm: 1 kOhm…1 MOhm |
| Alarm: 40 Ohm…500 kOhm | |
| Time delay range | 0…120 min for signalling circuit |
| Response time | <= 4 s |
| auxiliary supply voltage | 100…440 V AC 50/60 Hz +/- 15 % |
| 100…440 V AC 400 Hz +/- 15 % | |
| 100…440 V DC +/- 15 % | |
| Power consumption in VA | 25 VA |
| Measurement voltage | 120 V |
| 15 V | |
| 33 V | |
| Measurement current | 0…3 mA |
| 0…825 µA | |
| 0…375 µA | |
| internal impedance | 40 kOhm – AC at 0.1…440 Hz |
| 40 kOhm – DC | |
| Test function | Manual |
| Self test | |
| output contact | 2 C/O standard or fail-safe |
| breaking capacity | 250 V – AC at 6 A |
| 48 V – DC at 1 A | |
| Input function | Injection inhibition: 24 V AC 5 mA |
| Communication port protocol | Modbus |
| Communication port support | RS485 |
| Display type | Digital display |
| Mounting mode | Flush-mounted |
| Mounting support | Panel |
| Mounting position | Horizontal |
| Connections – terminals | Removable screw terminal block0.2…2.5 mm² |
| Material | Thermoplastic |
| Overvoltage category | III |
| net weight | 0.75 kg |
| Cut-out dimensions | 112 x 148 mm |
| Height | 123 mm |
| Width | 159 mm |
| Depth | 90 mm |
| Dielectric strength | 4000 V – AC |
| 5500 V – DC | |
| IP degree of protection | Case: IP20 |
| Front face: IP54 | |
| Environmental characteristic | Exposure to damp heat not in service conforming to IEC 60068-2-30 |
| Exposure to damp heat in service conforming to IEC 60068-2-56 | |
| Salt mist conforming to IEC 60068-2-52 | |
| Operating altitude | <= 3000 m |
| Pollution degree | 2 |
| Relative humidity | 0…90 % |
| Type of installation | Indoor |
| Standards | IEC 60364-4-41 |
| IEC 61010-1 | |
| IEC 61557-8 | |
| CSA C22.2 No 14-05 | |
| IEC 60364-5-51 | |
| UL 508 | |
| Product certifications | DNV |
| RMRS | |
| CE | |
| ABS | |
| EAC | |
| CSA | |
| cULus | |
| UL | |
| Ambient air temperature for operation | -25…55 °C |
| ambient air temperature for storage | -40…70 °C |
Dimension of Schneider IMD Vigilohm IM400
- Control Command networks, including sensitive loads such as PLCs, I/Os, sensors.
- Power Circuits networks, including power loads and power electronics such as speed drives, inverters, rectifiers, etc…
- Photovoltaic utility-scale sites, e.g. 4 MW per inverter (IM400C).
- Typical segments: Industry, Power Generation, Marine, Railways,
- Airport, Oil&Gas, Mining, Water, Heating & Cooling, lifts, …requesting continuity of service even in case of earth insulation fault.
- Harsh environment with IM400C.
Dimension of Schneider IMD Vigilohm IM400
