Product Description:

The HNL05.1R-0117-N0409-N-A4-NNNF is a mains choke produced by Bosch Rexroth Indramat for the HNL Mains Chokes series. In energy-recovery converter installations, this component is wired on the AC mains side, where its inductive impedance smooths current waves, limits differential voltage spikes, and protects switching devices against steep di/dt events. By stabilizing line conditions, the choke helps the connected inverter meet electromagnetic compatibility requirements and maintain controlled power flow back to the grid. This function does not require active control electronics and relies purely on passive magnetic elements.

The core parameter is a nominal inductance of 117 µH, which provides sufficient impedance at typical industrial frequencies to damp harmonic components while keeping voltage drop low. It is rated for a nominal current of 409 A, so drives that return power to the mains can be connected without saturating the magnetic core. Heat generated in the copper and iron is removed by liquid cooling; with water circulation, the permissible power dissipation reaches 2000 W, whereas natural airflow is limited to 1200 W. The assembly has a protection rating of IP00, so it must be installed inside a closed electrical cabinet. Thermal-monitoring switching contacts are integrated. They are rated for 1 A and up to 250 V AC or 24 V DC, and they open when the internal winding temperature rises above the preset threshold.

The choke belongs to design version 1 and is intended for supply systems classified as regenerative, allowing bidirectional energy transfer through the connected drive. When cabinet temperature stays below the 40 °C ambient limit, the normally closed thermal switch remains engaged, but at 160 °C it opens to signal an overtemperature event to the control circuit. No additional options are included. Mechanical considerations include a transport mass of 82 kg, so adequate mounting surfaces or crane support are needed during installation.