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Insulating monitoring device with fault location.
HAKEL ISOLGUARD HIG-IFL1 insulating monitoring device with fault location is a system designed for comprehensive insulating status monitoring of single-phase insulated IT systems (e.g. in the health sector). The device allows systems designed and operated in accordance with standards IEC 60364-7-710:2002 (electrical installations at healthcare facilities), IEC 61010-1:2010, IEC 61557-1, IEC 61557-8, IEC 61557-9 up to 275 V AC maximum operating voltage to be monitored. 

The device enables the thermal and current load of the isolation transformer to be evaluated. The HIG-IFL1 insulating monitoring device (IMD) is equipped with the fault location function (IFLS), owing to which the user can easily and precisely locate that segment of the system (channel) where the insulation resistance has dropped.

The device is equipped with a screen to display the numerical value of the observed insulation resistance and also the values of the isolation transformer’s current and thermal load. Furthermore, the device has pushbuttons for IMD parameter setting and LED controls indicating the insulated system status, including the condition of the various segments (in the channels) of the system.

An MDS-D panel with a touch screen can be connected to the device via the RS485 busbar for displaying the currently observed values and the current IMD setting. Communication via the RS485 line uses a protocol which is based on the PROFIBUS protocol. Description of the communication protocol is available on request. The built-in contacts enable remote signalling of insulation status faults in the system monitored and/or of thermal/current overload of the isolation transformer.

Only one insulation monitoring device can be connected to the same ungrounded IT power supply system.
Basic characteristics
• Insulation monitoring device for AC systems 0 to 275 V voltage
• Insulation fault evaluation in 8 independent circuits (channels) of the IT system, this number can be increased by using extension modules
• Display of the observed insulation resistance, current load and thermal load
• Isolation transformer temperature measurement by using one of 3 sensor types
• Isolation transformer current load measurement by means of a measuring current transformer
• Signalling contacts for IT system faults
• Connection to the RS485 busbar, insulation strength 2500 Vrms against the internal circuits and circuits of the system monitored
• Optional communication with a master system via the RS485 busbar
• Communication protocol description available on request
• Pushbuttons available for setting the critical values, hysteresis values and other parameters
• Access to the IMD parameter setting with the pushbuttons can be locked/ unlocked by a button combination
• Separate supply voltage allow also such IT systems as are not under voltage to be monitored
• Module of the rack case 19” standard 1U height

Dimension drawing
Dimension drawing
Installation diagram
Installation diagram
Article number 70 950
Installation instructions (1.35 MB)
2D model (837.43 KB) for registered only
3D model (2.58 MB) for registered only
EC declaration of conformity (83.77 KB) for registered only