Product Description:

The HNF01.1A-M900-E0202-A-480-NNNN is a three-phase mains filter produced by Bosch Rexroth Indramat and assigned to the HNF Mains Filters series. Installed between the plant supply and a drive cabinet, the unit suppresses differential and common-mode noise generated by pulse-width-modulated inverters. This helps keep high-frequency interference from returning to the incoming line, where it could disturb control voltage stability or interfere with neighboring electronic equipment. Its design suits industrial automation cells that run many servo axes over long motor cables, where reflected energy and impedance mismatch can raise conducted emissions.

Electrically, the filter is rated for a nominal line current of 202 A, allowing it to serve sizeable drive strings without thermal derating. The input range of 3 × AC 400–480 V –15 %/+10 %, 50/60 Hz matches common industrial low-voltage networks, so no step-down transformer is required for standard plant service. Its housing carries an IP20 degree of protection, indicating touch-safe terminals while expecting installation inside a control cabinet. The unit is classified as C3 in accordance with DIN EN 61800-3, which applies to industrial environments with dedicated supply feeders. The permissible motor cable extension reaches 900 m, helping limit voltage spikes and conducted disturbances that can return through the supply path.

In one enclosure, the filter can condition power for up to 15 axes, which helps centralize line-side filtering in complex multi-axis machines and reduces the need to distribute separate filter components across the cabinet. The unit is Design Version 1. The supply path is marked for feeding devices only, so it should not be connected to auxiliary loads that fall outside the intended drive supply branch. This arrangement keeps the filter focused on the inverter supply path rather than mixed utility circuits. Within the HNF family, it uses series code 01, which identifies its placement in that product line.