Insulation monitor
RN 5897/021
- Article number: 0069252
- Type: RN5897.12/021/61 AC/DC24-60V
Product description
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.
Technical specifications
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 |
Advantages
- Suitable for DC charging stations for electric vehicles acc. to IEC/EN 61851-23:2014/AC:2016-06
- 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
- Very fast reaction time ≤ 1 s
- Optimised insulation resistance monitoring also during mains voltage variation
- Self-test every full operating hours
- 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 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 changeover contacts each for insulation failures-Pre-alarm and alarm each galvanically isolated
- 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