Insulation monitor RN 5897/021

The insulation monitor RN 5897/021 of the VARIMETER IMD family is a solution for optimal insulation monitoring of modern IT systems. The device can be used in the most flexible way for AC, DC and AC/DC systems. Mains areas of applications are non-earthed DC charging stations for electric vehicles with mains voltages up to DC 1000 V. 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 5987/021 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.

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Advantages:

  • Suitable for DC charging stations for electric vehicles acc. to IEC/EN 61851-23:2014/AC:2016-06
  • Insulation monitoring according to IEC/EN 61557-8
  • Universal application in non-earthed AC-, DC-, AC/DC networks up to AC max. 250 V resp. DC max. 300 V
  • Connection 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 possible
  • Extended operating temperature range of – 40 … + 70 °C
  • Very fast reaction time ≤ 1 s
  • Optimised insulation resistance monitoring also during mains voltage variation
  • Self-test every full operating hours
  • Preventive fire and system protection
  • Detection of symmetric and asymmetric insulation faults
  • Easy adjustment of response values and setting parameter via Modbus
  • Suitable for large leakage capacitances up to 5 μF
  • 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)
  • With galvanic separated Modbus RTU interface

Features

  • Insulation monitoring according to IEC/EN 61557-8
  • 2 separate adjustable response thresholds (using e.g. for pre-alarm and Alarm)
  • Setting range of 1st response value (Pre-alarm): 1 kΩ … 500 kΩ
  • Setting range of 2nd response value (alarm): 1 kΩ … 500 kΩ
  • Energized or de-energized on trip can be selected for indicator relay
  • Display for indication of measured value, device parameters and device status
  • Automatic and manual device self-test
  • Alarm storage selectable
  • Protection against manipulation by sealable transparent cover
  • External control input for combined test- / reset-button with additional Stop of the measuring function
  • 2 wide voltage input for auxiliary voltage
  • Width 52.5 mm

 

Specification

Width: 52,5 mm
Classification: For DC charging stations
Response value: 1 – 500 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
Approvals: UL
Response value type: Adjustable
Bus interface: Modbus RTU
Enclosure design: Distribution board
Type: RN 5897/021

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