Insulation monitoring devices for insulated IT power supply systems

General measured data display, control via display and push-buttons on the unit

Complete assortment for monitoring the insulation status in hospitals, industry and special applications

More than 25 years of experience on the market

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Complete assortment of the ISOLGUARD system for Hospitals, including isolation transformers

50 kΩ insulation status monitoring including the fault location possibility

Inbuilt evaluation of isolation transformer’s load status

Supervisory panels, automatic transfer switches, alarm modules for UPS status monitoring

product catalogue


Insulation monitoring devices to monitor the isolation resistance from 100Ω to 51MΩ

Standard monitoring of insulated IT power supply systems for up to 3 x 6 kV AC voltage

Separate supply voltage allows to monitor IT power supply systems, which are not under voltage

Insulation status signalization via data communication, current loop or relay

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Insulation monitoring devices for mining applications with extremely fast response

Reaction to the insulation status fault within 80mS

Two insulation status monitored levels

Designed to operate on disturbed power supply systems

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Insulation monitoring devices for means of transport

It is possible to monitor DC power supply systems

Evaluation of the asymmetric insulation status failure

Certification for operation on traction vehicles

Product catalogue


HAKEL also manages a special customized insulation status monitoring application

Solutions for drilling kits

Solutions for water crafts and floating dredger

Insulation status monitoring on 3 x 22kv AC system

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Monitoring and supervisory panels with degree of protection up to IP66

Input/output modules for data collection

Isolation transformers

Automatic transfer switches


Basic information

The main advantages of IT power supply system equipped with insulation monitoring devices:

Operation continuity – in case of first fault (connection between IT power supply system and ground- earth fault) the network is still operational

Higher safety of operation
– Immediate overview of network status, continuous monitoring of the insulation level to earth
– Early detection of faulty devices by immediate signalisation by the insulation monitoring device
– Less risk of electric shock for the operator and higher fire safety
– Prevention of production losses and shutdowns, operations can continue in case of a first earth fault

Practice shows that there is an obsolute minimum of the earth connections caused by a step change of insulation resistance. The vast majority of them is caused by gradual deterioration of insulation. HAKEL Insulation Monitoring Devices „ISOLGUARD“ are therefore equipped with the display that shows exact numerical values of the insulation resistance and enable to monitor the changing status of the insulation before the origin of the first earth fault.

The insulation monitoring devices (IMD) offered by Hakel are used for easy application in ungrounded IT power supply systems in metallurgy, civil engineering, shipbuilding, in hospitals and the transport environment.

Overview catalogue of insulation monitoring devices here


IMD (Insulation Monitoring Device) utilization is at every IT power supply system.

Insulation Monitoring Device utilization is at every IT power supply system

Would you like to know more about a Insulation Monitoring Devices?

Please contact us info@hakel.com




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