Product Description:

The HNL01.1R-2250-S0180-A-480-NNN2 is a mains choke produced by Bosch Rexroth Indramat and assigned to the HNL Mains Chokes series. In an automation cabinet, the choke sits between the line supply and the drive inverter to damp line-side harmonics, limit inrush current, and support stable DC-bus voltage when regenerative energy flows back toward the utility. By shaping current and smoothing voltage, it protects upstream contactors and downstream power electronics while supporting electromagnetic compatibility of the machine installation. It also helps reduce stress on rectifier sections when several axes accelerate or decelerate during the same operating cycle in a shared cabinet.

The choke accepts a nominal line voltage of 3 x AC 400–480 V -15/+10%, 50/60 Hz, so the winding insulation supports common industrial grids even when the supply varies within the stated tolerance. This rating also confirms that the unit is intended for three-phase power rather than single-phase service. Its winding set uses a current-compensated configuration, meaning opposing magnetic fields inside the core cancel common-mode noise before it reaches sensitive controllers. A housing rating of IP10 provides finger protection but no dust protection, so the choke is intended for installation inside a closed electrical cabinet. That enclosure location also helps keep airborne debris and incidental contact away from the magnetic assembly during normal machine operation.

The unit is designed for regenerative supply systems, so core saturation and thermal rise are suited to energy that flows from the drive back into the mains during braking. It is identified as Series 01 with Design Version 1, and its electrical values are matched to inverter stacks up to 225 A continuous. Installation spacing, conductor cross section, and cabinet magnetic layout must be selected so the choke can maintain its impedance near its operating temperature limits. The choke is intended for cabinet assemblies where the line reactor works directly with the inverter input stage rather than as a stand-alone power-conditioning device.