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RN 5897/011

Insulation monitor

RN 5897/011


Auxiliary voltage

Alarm value

Prewarning value


  • 0069283
  • RN5897.12/011 AC/DC24-60V
The insulation monitor RN 5897/011 of the VARIMETER IMD family provides best and up to date... more

Product description

The insulation monitor RN 5897/011 of the VARIMETER IMD family provides best and up to date insulation monitoring of modern IT systems in an optimum and state of the art way fulfilling the relevant standards. The device can be used in the most flexible way for AC, DC and AC/DC systems even with large leakage capacity to earth (PE). The adjustment of the setting values is simple and user friendly done on 2 rotary switches on the front of the device. Via display and LEDs the measured value, device parameters and device status are indicated easy to read. With a sealable transparent cover the device is protectet against manipulation. The RN 5987/011 has an additonal Modbus RTU-interface. All measured values, device states and parameters can be read out, set and parameterized. All functions available on the device can also be operated via Modbus.

Technical specifications

Width: 52,5 mm
Response value: 1 - 2000 kΩ
IMD type: AC, DC, AC/DC
Nominal voltage IT system: AC 0 - 230, AC 0 - 690 (Coupling device), DC 0 - 230, DC 0 - 1000 (Coupling device) V
Auxiliary voltage: AC/DC
Earth fault indicator: Yes
Response value type: Adjustable
Bus interface: Modbus RTU
Enclosure design: Distribution board
Type: RN 5897/011


  • Preventive fire and system protection
  • Detection of symmetric and asymmetric insulation faults
  • Quick fault localisation through selective earth fault detection to L+ and L-
  • Universal application in non-earthed AC, DC, AC/DC networks up to AC max. 250 V or DC max. 300 V
  • With connection facility of an external coupling device RL 5898 for voltages up to AC 400 V / DC 500 V or RP 5898 for voltages up to AC 690 V / DC 1000 V
  • Easy adjustment of response values and setting parameter via rotational switch and menu display or via Modbus RTU-interface
  • Suitable for large leakage capacitances up to 1000 μF
  • Optimised reaction time for large leakage capacitances
  • Monitoring also with voltage-free mains
  • Measuring circuit L(+)/L(-) with broken wire detection (can be switched off)
  • Protective conductor PE1/PE2 with broken wire detection (can't be switched off)
  • 2 changeover contacts each for insulation failures-Pre-alarm and -alarm each galvanically isolated
  • With galvanic separated Modbus RTU interface


  • Insulation monitoring according to IEC/EN 61557-8
  • Trigger output for insulation fault locating system
  • 2 separate adjustable response thresholds (using e.g. for pre-Alarm and Alarm)
  • Setting range of 1st response value (Pre-Alarm): 1 kΩ … 2 MΩ
  • Setting range of 2nd response value (Alarm): 1 kΩ … 2 MΩ
  • Energized or de-energized on trip can be selected for indicator relay
  • Display for indication of measured value, device parameters and device status
  • Setting the maximum leakage capacitance to shorten the response time
  • Automatic and manual device self-test
  • Alarm storage selectable
  • Protection against manipulation by sealable transparent cover
  • External control input for combined Test-/Reset-button
  • 2 wide voltage input for auxiliary voltage
  • Width 52.5 mm