Insulation monitor UH 5892 The insulation monitor UH 5892 of the series varimeter IMD monitors the ground 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 uF. Advantages . Preventive fire and system protection . 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 Features . Insulation monitoring according to IEC/EN 61557-8 . 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 Technical specifications Width: 45mm Enclosure design: Switch cabinet IMD type: AC, DC, AC/DC Nominal voltage IT system: AC 0 - 400, DC 0 - 600V Response value type: Fixed Response value: 50kΩ Earth fault indicator: Yes Auxiliary voltage: AC/DC Connection for indicator: Yes Type: UH 5892 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: UH5892.11PS UH AC/DC24-60V 50K Art. No.: 0066309