Insulation monitor IL 5881

The insulation monitor IL 5881 of the series VARIMETER IMD monitors the insulation resistance of non-earthed DC systems (IT-systems) with nominal voltage up to DC 12 … 280 V. The supply voltage (auxiliary voltage) is taken from the monitored system. The device has LEDs to indicate the operating status. The response value can be set in a user-friendly way on the front of the device via a potentiometer.

Advantages and Features:​

• With reference to IEC/EN 61557-8 (see also section “Notes”)​
• For DC voltage systems up to 12 … 280 V​
• Wide voltage range of measuring input UN DC 12 … 280 V (on request DC 24 … 500 V with separate auxiliary supply, Measuring range 20 … 500 kΩ)​
• Easy adjustment of response value​
• Selective ground fault indication for L+ and L- allows fast fault finding​
• Adjustable tripping value RAL of 5 … 200 kΩ or 10 … 500 kΩ​
• Selective ground fault indication for L+ and L- allows fast fault finding​
• Without auxiliary supply​
• De-energized on trip​
• 2 changeover contacts​
• Automatic or manual reset, programmable​
• With test and reset buttons​
• Connection for external test and reset button possible​
• Galvanic separated AC or DC auxiliary supply available as option​
• Adjustable time delay as option​
• 2 models available:​
  • IL 5881: 61 mm deep with terminals near to the bottom to be mounted in consumer units or industrial distribution systems according to DIN 43880​
  • SL 5881: 98 mm deep with terminals near to the top to be mounted in cabinets with mounting plate and cable ducts​
• DIN rail or screw mounting​
• 35 mm width