Dold Industries Ltd

11 Hamberts Rd. Blackall Ind. Estate
South Woodham Ferrers
GB-Essex, CM3 5UW
IP 5880

Insulation monitor

IP 5880


Auxiliary voltage

Alarm value

Approvals and Markings


  • 0056909
  • IP5880.12 AC/DC110-240V
The insulation monitor IL 5880 of the series VARIMETER IMD monitors the insulation resistance... more

Product description

The insulation monitor IL 5880 of the series VARIMETER IMD monitors the insulation resistance of isolated single phase or 3-phase voltage systems (IT-systems) with nominal voltage up to AC 0 ... 500 V. The separate supply voltage (auxiliary voltage) allows also monitoring when the system is without voltage. 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.

Technical specifications

Width: 35 mm
Response value: 5 - 500 kΩ
IMD type: AC
Nominal voltage IT system: AC 0 - 500 V
Auxiliary voltage: AC/DC
Earth fault indicator: Yes
Response value type: Adjustable
Enclosure design: Distribution board
Type: IP 5880


  • Preventive fire and system protection
  • For single and 3-phase AC-systems up to 0 ... 500 V and 10 ... 10000 Hz
  • Monitors also disconnected voltage systems
  • Easy adjustment of response values


  • According to IEC/EN 61557-8
  • Adjustable tripping value RAL of 5 ... 100 kΩ or 10 ... 500 kΩ
  • De-energized on trip
  • Auxiliary voltage Measuring Circuit and output contacts are galvanically separated
  • Manual and auto reset
  • With test and reset button
  • Connections of external test and reset buttons possible
  • LED indicators for operation and alarm
  • 2 changeover contacts
  • IL/SL 5880/200 with additional prewarning
    - Adjustable prewarning value 10 kΩ ... 5 MΩ
    - Output function programmable
  • Variant IL/SL 5880/300 according to DIN VDE 0100-551 for mobile generator sets available
  • 4 models available:
    IL 5880, IP 5880: 61 mm deep with terminals near to the bottom to be mounted in consumer units or industrial distribution systems according to DIN 43880
    SL 5880, SP 5880: 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