Insulation monitor RN 5897/020

The insulation monitor RN 5897/020 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. 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.

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​
• Very fast reaction time ≤ 1 s​
• Optimised insulation resistance monitoring also during mains voltage variation​
• Self-test every full operating hours​
• Detection of symmetric and asymmetric insulation faults​
• Quick fault localisation through selective earth fault detection to L+ and L-​
• Easy adjustment of response value and setting parameter via rotational switch​
• 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)​
• 2 separate adjustable response thresholds (using e.g. for pre-alarm and Alarm)​
• Setting range of 1st response value (Pre-alarm): 20 kΩ … 500 kΩ​
• Setting range of 2nd response value (alarm): 1 kΩ … 100 kΩ​
• 1 changeover contacts each for insulation failures-Pre-alarm and –alarm​
• 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​
• 3 wide voltage input for auxiliary voltage​
• Width 52.5 mm