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Insulation range

Part of PowerLogic

Insulation monitoring devices for fault detection and location

  • Features

    The Vigilohm range of insulation monitoring devices (IMDs) are an indispensible solution for implementing an IT (ungrounded) networks. Vigilohm provides solutions tailored to your network, including simple, reliable insulation monitoring, communication, and fault location. This renewed and simplified offer helps improve personnel and equipment safety, and process availability.

    Find out more:
    Vigilohm Catalogue (2019)
    Vigilohm ebrochure
    Brochure: Vigilohm for Photovoltaic
    Application guide: The IT earthing system

    Injection principle
    - Measures the resistance of a circuit
    - Triggers an alarm in case of an insulation fault, through contact relays, local message and Modbus communication

    Standards compliance
    - Complies with all major standards, IEC, UL, DNV

    Key characteristics
    - Fault detection and signaling
    - Insulation resistance value display
    - Earth leakage capacitance display
    - Modbus communication
    - Data log with time-stamped events
    - Voltage adaptor compatibility
    - Advanced transformer monitoring
    - Refer to the Vigilohm catalog for complete feature and specification information on each device in the Vigilohm range.


    In low voltage electrical distributions, the combined use of an IT network arrangement and insulation monitoring devices:

    • Increases personnel safety
    • Reduces risk of fire or explosion
    • Increases process uptime
    • Eases maintenance and reduces OPEX


    Vigilohm helps you make the best of your IT electrical network:

    • Industry, including chemical, refinery, and transformation processes, where continuous process is critical
    • Infrastructure like airports, harbors, tunnels, and railways where safety is at stake
    • Healthcare, specifically in areas like operation theaters and intensive care unit for security of patient and medical staff
    • Marine for safety reasons
    • Power Generation like photovoltaic, wind, hydro and nuclear, to help prevent fires
    • Extraction, such as oil & gas and mining, to prevent fire and/or explosion


    • Vigilohm IFL12 advanced
    • Vigilohm IFL12C - insulation fault locator
    • Vigilohm IM20
    • Vigilohm IM20-1700 for high voltage installations
    • Vigilohm IM9
    • Vigilohm IM20-H for healthcare facilities
    • Vigilohm IFL12H - insulation fault locator
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