General
Nominal voltage	520/300 VAC
Frequency range	48 to 63 Hz
Nominal current	16 A
Leakage current	<0,4 mA
Degree of protection	IP20
Construction	Metal housing
Mounting	mounting brackets with holes
Climate category	25/085/21
Approvals	CE, UL
Standards	EN 60939, UL 1283, CSA 22.2 No. 8, RoHS

The EPA NF-K-4-16 is a three-phase high-performance EMI power filter designed for use in installations with high electromagnetic compatibility requirements. With a rated current of 16 A and a voltage range of 400 to 520 V AC at 50/60 Hz, it is suitable for industrial and commercial applications where stable and disturbance-free power supply is required. The filter features a two-stage damping technology, enabling very high suppression of disturbances in the frequency range of 48 to 63 Hz. The book-type design with a compact base area of 60 mm width and 305 mm length allows space-saving installation in enclosures. The neutral conductor is integrated, simplifying installation in 3-phase systems with N-conductor. The metal housing ensures robust mechanical construction and provides IP20 protection, safeguarding against contact with moving parts and entry of solid foreign objects larger than 12.5 mm. The climate category 25/085/21 (−25°C to +85°C) ensures reliable operation over a wide temperature range, making it suitable for diverse operating conditions.

Applications

The NF-K-4-16 is used in installations requiring high EMI compatibility, such as in automation technology, manufacturing industry, or building technology. It serves to suppress disturbances caused by electronic devices, frequency converters, or other nonlinear loads in the network. The application typically occurs in enclosures, where it is mounted between the power supply and the load to reduce disturbances in the circuit and ensure the functionality of sensitive electronic components.

Functions and Equipment in Detail

The power filter operates with a two-stage damping system, effectively reducing disturbances in the range of 48 to 63 Hz. The integrated neutral conductor path enables use in 3-phase systems with N-conductor. The leakage current is less than 0.4 mA, significantly enhancing safety and minimizing grounding load. The leakage current is 1.7 mA, within permissible limits. Mounting is achieved via lugs with holes, allowing secure installation in standard enclosures. The housing is made of metal, ensuring high mechanical stability and heat dissipation.

Technology Explained Simply

The filter uses a two-stage damping technology, where disturbances in the AC network are suppressed by inductive and capacitive elements. The first stage filters disturbances at the fundamental frequency, while the second stage provides additional damping at higher frequencies. The rated voltage of 520/300 VAC (±10%) covers the typical operating voltage range in Europe and other regions. The operating temperature of up to +85°C at an ambient temperature of +25°C (climate category 25/085/21) allows use in warm environments, such as those found in industrial enclosures. The IP20 protection class safeguards against contact with moving parts and entry of solid foreign objects larger than 12.5 mm, which is sufficient for use in enclosed enclosures.

Compatibility and Accessories

The NF-K-4-16 is designed for 3-phase systems with neutral conductor and can be mounted in standard enclosures. It is compatible with standards EN 60939, UL 1283, and CSA 22.2 No. 8, ensuring approval for use in various markets. The CE and UL certifications confirm compliance with applicable safety and EMI directives.

Mounting and Installation

Mounting is done via the integrated mounting lugs with holes, located on the sides of the metal housing. The filter is inserted into the enclosure and secured with screws or bolts. The connection terminals are designed for cables capable of safely carrying the rated current of 16 A at 50°C. Installation is performed between the power supply and the load to reduce disturbances in the circuit. Dimensions of 305 mm length, 60 mm width, and 142 mm height allow compact placement in standard enclosures.

Advantages in Operation

The NF-K-4-16 offers very high suppression of disturbances, increasing the reliability of electronic devices. The low leakage current of less than 0.4 mA reduces grounding load and enhances safety. The robust metal construction and climate category 25/085/21 ensure long service life even under demanding operating conditions. The book form enables space-saving installation, which is advantageous in tight enclosures. The CE and UL certifications, along with norm compliance, guarantee suitability for use in various markets.