Leakage current reduction filters NF-DAR

Product catalog summary

Overview: The document is a product data sheet for the NF-DAR leakage current reduction filters, designed to suppress unwanted leakage currents of ≥ 2 kHz, enhancing safety for devices with Residual Current Devices (RCDs). These filters are suitable for nominal currents ranging from 10 A to 300 A.

Specifications:

Nominal Currents: 10 A to 300 A
Nominal Voltage: 520 VAC, 3-phase
Frequency Range: DC up to 63 Hz
Overload Capability: 4 times rated current at switch on, then 1.5 times rated current for 1 minute, once per hour
Construction: Metal housing with chassis mounting
Protection Degree: Up to 180 A: IP 20, from 300 A: IP 00
Flammability Class: UL 94V-2 or better
Climate Category: -25 °C to +85 °C
Approvals: CE, built according to EN 60939, UL 1283, RoHS, CSA 22.2 No. 8

Functionality: The NF-DAR filters are designed to reduce leakage currents caused by long motor cables, providing high attenuation in the switching frequency range and preventing unwanted RCD trippings. They are suitable for use with frequency inverters and servo controllers.

Performance Data: The document includes graphs showing leakage current measurements over time and frequency, demonstrating the effectiveness of the NF-DAR filters in reducing leakage currents to prevent RCD tripping.

Application Example: An example is provided where a 1.5 kW three-phase AC motor with a frequency inverter and 50 meters of shielded motor cable shows leakage current peaks up to 2 A. The NF-DAR filter reduces these currents significantly, allowing for stable operation without RCD tripping.

Technical Data: Detailed technical specifications are provided, including dimensions, connection types, and weight for various models of the NF-DAR filters.

Conclusion: The NF-DAR leakage current reduction filters are essential for ensuring the safe operation of frequency inverters and other devices with RCDs, particularly in installations with long motor cables where high leakage currents are a concern.

Catalog excerpts

Leakage current reduction filters NF-DAR-1

NF-DAR Ableitstromreduktionsfilter Leakage current reduction filters Produktdatenblatt Product data sheet Zur Unterdrückung unerwünschter Ableitströme ≥ 2 kHz Erhöht die Betriebssicherheit an Anlagen mit FI-Schutzschalter Für Nennströme von 10 A bis 300 A For suppression of unwanted leakage currents ≥ 2 kHz Increases the safety for devices with a RCD For nominal currents from 1

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Leakage current reduction filters NF-DAR-2

Ableitstromreduktionsfilter | Leakage current reduction filters ABLEITSTROM-REDUZIERUNG g Nennstrome von 10 A bis 300 A g Verringerung von Ableitstromen durch lange Motorleitungen verursacht g Hohe Dampfung im Bereich der Taktfrequenz g Verhindert ungewollte FI-Auslosungen g Geeignet fur Frequenzumrichter und Servoregler mit langer Motorleitung REDUCTION OF LEAKAGE CURRENTS g Nominal currents from 10 A up to 300 A g Reduction of leakage current caused by long motor cables g High attenuation in the range of the switching frequency | g Prevents unwanted RCD trippings g Suitable for frequency inverters...

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Leakage current reduction filters NF-DAR-3

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Leakage current reduction filters NF-DAR-4

Operating a frequency inverter on a RCD can be a challenge! EMV-Maßnahmen (wie Netzfilter, Motorfilter, Schirmung der Motorleitung) erhöhen den Ableitstrom auf Werte, die nicht selten den FI-Schutzschalter zur Auslösung zwingen. FI-Schutzschalter können nicht zwischen betriebsbedingten Ableitströmen und echten Fehlerströmen unterscheiden. Für den Personenschutz sind FI-Schutzschalter mit einem Bemessungsdifferenzstrom von 30 mA (VDE 0100-410) und für den Brandschutz 300 mA bzw. 420 mA (VDE 0100-482) vorgeschrieben. Seit der Einführung des allstromsensitiven FI-Schutzschalters (Typ B) und des...

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