Product Description:

The HNL05.1R-0117-N0409-N-A4-NNNW is a mains choke manufactured by Bosch Rexroth Indramat for the HNL Mains Chokes series. Installed between the incoming three-phase supply and an inverter, the choke limits line harmonics and attenuates voltage peaks that would otherwise reach the drive system. By adding impedance to each phase conductor, it reduces current ripple and protects sensitive power-electronic components in regenerative industrial automation setups.

This unit provides a nominal inductance of 117 µH, which provides the impedance necessary to smooth high-frequency disturbances. The winding can carry a continuous current of 409 A without saturation, and this rating matches medium-power converters that draw large RMS values during regeneration. It accepts supply networks from 3 × AC 380 V −15 % … 500 V +10 %, allowing installation on common low-voltage industrial grids. The open-frame construction carries a protection class of IP00, so it must be mounted in an enclosed cabinet that provides shock and touch guarding. Thermal energy produced by copper and core losses is removed through internal air cooling, so airflow inside the cabinet must be maintained. Auxiliary contacts are provided in N/C form; they are rated at 1 A and 250 V AC or 24 V DC for status signaling. The unit is design version 1.

Total power converted into heat is limited to 2500 W, so the cabinet must supply enough airflow or external cooling capacity. The laminated core and windings weigh 90 kg, so mechanical support and vibration isolation should be considered during panel design. An embedded thermal switch trips at 160 °C to prevent insulation damage and opens the auxiliary N/C contact for drive shutdown. The choke is intended for regenerative supply systems, returning energy to the grid rather than dissipating it in braking resistors. Water cooling is not used, so water dissipation remains at 0 W.