Product Description:

The HNL01.2R-0540-C0094-A-480-NNN is a mains choke manufactured by Bosch Rexroth Indramat for the HNL Mains Chokes series. Mounted on the line side of regenerative drive assemblies, it adds impedance that smooths the current waveform and reduces voltage spikes before they reach the inverter power section. This protective role helps lower electromagnetic interference and extends the life of connected semiconductor components in industrial automation cells. That smoothing action also supports stable operation when regenerative drives return energy to the supply.

This choke carries a housing rated at IP10, so its live parts are protected against accidental contact while ventilation openings remain unobstructed for heat dissipation. It is identified as design version 2, which matches the second release of the product platform. The winding set is optimized for a nominal network of 3 x AC 400–480 V and supports a -15% to +10% tolerance without core saturation. Integrated damping elements use integrated capacitors, and the parallel RC network moderates differential-mode disturbances that appear during rapid energy recovery. Because the choke is intended for a regenerative supply system, it accommodates bidirectional power flow created when the drive feeds excess kinetic energy back to the mains, helping keep current crest factors within acceptable limits for upstream circuit breakers.

Line frequency compatibility spans 50/60 Hz, allowing deployment alongside standard European or North American grids. Internally it belongs to construction stage 01, so it uses the corresponding HNL mechanical frame layout. In cabinet layouts, it serves as a line-side component that conditions incoming current before it reaches the regenerative drive section. It is installed ahead of the power section rather than on the motor output, so it addresses disturbances at the mains connection.