Product Description:

The HNL01.1E-1000-N0020-A-500-NPNN is a three-phase mains choke manufactured by Bosch Rexroth Indramat. In an automation cabinet, it is connected ahead of an inverter or servo drive to attenuate line-side harmonics, smooth current draw, and protect switching components from steep voltage rises. By adding series inductance, the choke limits di/dt without active control hardware, making it a simple protective element for drives and power supplies on three-phase utility networks. This passive approach also reduces stress on rectifier input stages during normal operation and helps stabilize the incoming supply current. Because it works on the line side, it can improve current waveform behavior before power reaches the converter section of the connected equipment.

The choke has a degree of protection of IP10, so it relies on the surrounding enclosure rather than a sealed housing for personnel and dust protection. It connects to utility lines rated at 3 x AC 380–500 V, allowing use across a broad range of low-voltage industrial grids. Compatible base frequencies of 50/60 Hz cover both IEC and North American power standards without adjustment. The component is used in the supply-side Feeding section of a drive system, where its inductance is placed ahead of the rectifier to stabilize incoming current. The unit is Design Version 1, which marks the first implementation of this electrical configuration and mechanical footprint.

The component is part of the HNL Mains Choke platform and uses release code 01, which standardizes mounting points and terminal spacing. An allowable input range of ‑15/+10% around nominal line voltage accommodates common supply variations caused by transformer tap settings or changing local loads. No optional filters, sensors, or thermal switches are included, and the option code is None. That arrangement keeps the choke focused on passive line conditioning and leaves additional monitoring functions to the surrounding drive system.