Insulation monitoring relay for ungrounded (IT) supply systems up to 250 V AC, 15-400 Hz and up to 300 V DC Measuring range 1-100 kohm Supply voltage 24-240 V AC/DC 22.5 mm, 1 change-over contact screw terminal Insulation monitoring relay with analog setting SIRIUS 3UG4 for monitoring non-grounded (IT) networks for insulation faults, e.g. in systems with strict requirements on availability (chemical industry, automobile manufacture, printing) in shipbuilding and the railway sector or in emergency power supplies.
Worldwide use thanks to wide voltage supply range and international certificates. New predictive measurement principle allows very fast response times. Direct connection to networks with mains voltages of up to 690 V AC and 1 000 V DC by means of the 3UG4983-1A voltage reducer module The relay permits a permanent self-monitoring and manual test option. Reliable system diagnostics thanks to unambiguous error messages and connectable fault memory.
Apart from devices for insulation monitoring of non-grounded alternating voltage networks, devices are also available for monitoring non-grounded DC and AC voltage networks, with screw terminals in each case.
Available accessories comprise cover caps and a voltage reducer module for extending the range of measurement.
SIRIUS relays - one range for every application
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