Product Description:

The HNL05.1R-0234-N0352-N-A5-NNNF mains choke is produced by Bosch Rexroth Indramat within the HNL Mains Chokes series. As a line reactor, the unit is installed between a regenerative supply and the drive system to smooth the current waveform, limit inrush peaks, and protect downstream components from high-frequency disturbances. The component therefore plays a supportive but critical role in maintaining stable DC bus voltages and meeting harmonic limits for industrial automation equipment.

Key electrical parameters describe how the choke interacts with the three-phase network. Its nominal inductance of 234 µH establishes the impedance that attenuates rapid current changes caused by regenerative energy flow. A nominal current rating of 352 A indicates the continuous line current the copper winding can carry without exceeding its thermal class. Compatibility with 3 x AC mains power ensures correct operation in standard industrial power grids. Heat generated in the winding is removed through liquid cooling; coolant passes through the housing to keep the copper below its insulation limit even during prolonged regenerative operation. Because the choke has an IP00 degree of protection, it must be mounted inside a control cabinet that provides mechanical shielding and prevents accidental contact.

Thermal management figures complement the electrical data. Under steady airflow, the iron core radiates up to 1300 W, while the cooling circuit can absorb an additional 1900 W, giving the assembly a combined loss rating suitable for high-power drive cabinets. A built-in temperature contact opens at a trigger point of 160 °C and carries up to 1 A; this normally closed sensor allows the controller to shut down the supply before insulation limits are exceeded. The choke weighs 110 kg, so cabinet reinforcement and lifting aids are usually needed during installation, and the added mass can help reduce acoustic vibration under load.