Product Description:

The HNL01.1E-0571-N0050-A-500-NPNN is a mains choke engineered by Bosch Rexroth Indramat for the HNL Mains Chokes series. Installed between the facility’s incoming power and a drive controller, it limits line-side current distortion and reduces the voltage ripple presented to DC link capacitors in industrial automation cabinets. By conditioning the incoming supply before it reaches the rectifier stage, the choke helps servo drives and inverters maintain stable operation when load demand changes.

This choke is rated for a maximum line voltage of 3 × AC 380–500 V, which makes it suitable for industrial power panels operating on a three-phase network. Compatible grid frequencies span 50/60 Hz, so the unit can be used in regions that follow either standard mains frequency. The enclosure has an IP10 degree of protection, which guards live parts against accidental finger contact while still allowing heat to dissipate through natural convection. The unit is built as version 1, so its mounting footprint and terminal layout follow the first design release of this product family. This arrangement supports straightforward integration in cabinets where airflow, wiring access, and line conditioning all need to be managed within a compact space.

The permissible voltage tolerance of -15 /+10 % broadens the usable input range so the choke can accommodate typical mains variation without reaching magnetic saturation. In the supply hierarchy, it is classified as a feeding element, which means it is installed on the supply side rather than in the motor circuit. Its internal product coding includes series code 01, which distinguishes this electrical configuration within the product line. Because it works ahead of the connected drive components, it helps smooth the incoming electrical conditions seen by the rest of the system during normal operation.