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E. Dold & Söhne GmbH & Co. KG

Insulation monitor, RN 5897/021
Type:  Monitoring Hardware
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.
Connectivity:  Modbus RTU
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
Specifications:  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
 

(Specification Sheet)