Product Description:

The HNL01.1R-0540-C0094-A-480-NNNN is a line-side mains choke produced by Bosch Rexroth Indramat for the HNL Mains Chokes series. It is installed between the three-phase utility feed and the converter input in regenerative drive cabinets to damp current surges, limit harmonic distortion, and stabilize the DC link during energy recovery. By raising source impedance, the component helps protect upstream fuses and wiring while improving power factor in automated machining and material-handling cells. Its compact housing also allows straightforward integration beside breakers and contactors inside standard control enclosures.

This model accepts input in the range of 3 × AC 400–480 V -15/+10%, 50/60 Hz, enabling direct connection to common European and North American low-voltage grids. The coil assembly is ventilated yet guarded to the IP10 protection level, which helps prevent accidental finger contact while allowing free airflow for heat dissipation. An integrated filter stage with capacitors forms an L-C network that suppresses high-frequency components and minimizes bus-voltage ripple under rapidly switching inverters. The mechanical and electrical dimensions correspond to Design Version 1, which keeps terminal size, bolt pattern, and inductance consistent for standardized installation.

The choke is optimized for a regenerative supply system, meaning its core material and winding gauge support continuous bidirectional energy flow during motor braking cycles. Within the family, it carries the numeric identifier 01. In this role, the inductive element reduces steep line current changes seen by the upstream supply when the converter switches quickly or returns energy to the mains. This operating profile suits applications where recovered braking energy returns through the supply path and where stable line impedance helps moderate current peaks.