General
Nominal voltage	520 VAC
Frequency range	48 to 63 Hz
Nominal current	10 A
Reduction range	2–16 kHz
Degree of protection	IP20
Construction	Metal housing
Approvals	CE, UL
Standards	EN 60939, UL 60939-3, CSA 22.2 Nr. 8, RoHS

The ABG NF-DAR-10-3 from EPA is a three-phase leakage current reduction filter, specifically developed for reducing high-frequency leakage currents in the range of 2 to 16 kHz. It supports the function of residual current circuit breakers (RCCBs) of type B or B+ in electrical installations where increased leakage currents occur due to connected devices. The filter thus enables safe and reliable protection of the power supply without requiring additional damping measures for network disturbances. The application is in industrial and commercial electrical installations where compliance with the protective functions of RCCBs is critical.

Applications

The filter is designed for use in three-phase AC networks, particularly in installations with electronic consumers that generate high leakage currents, such as frequency converters, LED lighting systems, or other non-linear loads. It is typically installed in the distribution box or near the main distribution to reduce leakage currents before they enter the grounding system. The application is for indoor use only, as the protection rating IP20 does not provide protection against contact or moisture in outdoor environments.

Functions and Equipment in Detail

The ABG NF-DAR-10-3 reduces leakage currents in the frequency range of 2 to 16 kHz by up to 90%. This range covers typical disturbances caused by electronic devices. The reduction is achieved through special absorption components inside the filter, which absorb the high-frequency currents and convert them into heat. The filter is rated for a nominal current of 10 A and can therefore be used in installations with corresponding load. It is not designed for damping network disturbances in the sense of electromagnetic compatibility (EMC), but exclusively for leakage current reduction.

Technology Explained Simply

The operation is based on absorbing high-frequency currents flowing through the earth conductor. These currents can impair the function of residual current circuit breakers, especially types B or B+, which are designed to protect against weak fault currents. The filter reduces these currents, allowing the RCCB to perform its protective function without interference. The technology is passive and requires no external power supply. The metal housing construction ensures mechanical stability and sufficient thermal dissipation cross-section to dissipate the heat generated by absorption.

Compatibility and Accessories

The filter is specifically designed for use in combination with EPA EMC power filters. This combination allows targeted adaptation of the installation to specific interference conditions, where the leakage current reduction filter reduces earth currents and the EMC filter dampens network disturbances. The combination is typically implemented in the same distribution box, with electrical connections made in accordance with the relevant standards.

Installation and Mounting

Installation is carried out in a closed distribution box, where the protection rating IP20 ensures that no contact with live parts is possible. The filter is installed in the line between the power supply and the load, with the phase and earth conductors connected accordingly. Mounting is done via screw connection, ensuring that the maximum permissible current load of 10 A is not exceeded. The dimensions of 114 mm length, 58 mm width, and 45 mm height allow installation in standard distribution boxes. The operating voltage is in the range of 400 to 520 V AC at a frequency of 50/60 Hz.

Operational Advantages

Using the ABG NF-DAR-10-3 enables the use of residual current circuit breakers type B/B+ in installations that would otherwise not be safely protected due to high leakage currents. This increases the safety of the installation and reduces the risk of false alarms or failures. The passive technology requires no maintenance and is durable. Compatibility with EMC power filters offers flexible adaptation to different requirements. Compliance with standards EN 60939, UL 60939-3, CSA 22.2 No. 8, and RoHS ensures conformity with international safety and environmental standards.