Insulation monitor RN 5893

The insulation monitor RN 5893 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 protected against manipulation. The RN 5983 has an additional 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.

Advantages and Features:​

• Insulation monitoring according to IEC/EN 61557-8​
• Suitable for DC charging stations for electric vehicles acc. to IEC/EN 61851-23:2014/AC:2016-06​
• 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​
• RN 5893: Very fast reaction time ≤ 1 s​
• RN 5893/010: Reaction time ≤ 10 s​
• Optimised insulation resistance monitoring also during mains voltage variation​
• Detection of symmetric and asymmetric insulation faults​
• Quick fault localisation through selective earth fault detection to L+ and L-​
• Easy adjustment of response values and setting parameter via rotational switch and menu display or via Modbus RTU-interface​
• RN 5893: Suitable for large leakage capacitances up to 5 μF​
• RN 5893/010: Suitable for large leakage capacitances up to 30 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)​
• 2 parameterizable changeover contacts (for insulation fault pre-alarm, insulation fault-alarm, insulation fault-alarm on DC+/DC- or device fault) each galvanic separated​
• With galvanic separated Modbus RTU interface​
• 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