Insulation monitor UH 5892

The insulation monitor UH 5892 of the series VARIMETER IMD monitors the insulation resistance of isolated DC-voltage systems (IT-systems) with nominal voltage up to DC 600 V. The unit detects symmetrical as well as unsymmetrical faults. The separate auxiliary supply of AC/DC 24…60 V or AC/DC 85…230 V allows also monitoring when the system is without voltage. To indicate the actual ground resistance value the unit has an LED chain and an analogue output. When a fault is detected the relay switches and the red LED Alarm lights up, The device can be used for system with leakage capacities up to 20 μF.

Advantages and Features:​

• Insulation monitoring according to IEC/EN 61557-8​
• Insulation monitoring of DC voltage systems up to 600 V nominal voltage​
• No additional coupling device required​
• Suitable for leakage capacitances up to 20 μF​
• Monitoring also with voltage-free mains​
• 2 wide voltage input ranges for auxiliary voltage​
• Detection of symmetric and asymmetric insulation faults​
• 1 changeover contact for alarm​
• Fixed response value RAN: 50 kΩ, other on request​
• Internal reset and test pushbutton​
• External test and reset pushbutton can be connected​
• LED indicator for auxiliary voltage and alarm​
• LED chain to indicate the current insulation resistance​
• Automatic or manual reset, programmable​
• Analogue output for insulating value​
• External indicating instrument can be connected​
• Closed circuit operation​
• Open circuit operation on request​
• With pluggable terminal blocks for easy exchange of devices​
• with screw terminals​
• or with cage clamp terminals​
• Width 45 mm