Product Description:

The HNF01.1A-N1K0-R0450-A-480-NNIT mains filter is produced by Bosch Rexroth Indramat and belongs to the HNF Mains Filters series. Positioned between the plant supply and regenerative drive controllers, the unit attenuates conducted interference and limits the return of switching harmonics to the grid. This protection helps keep emissions inside industrial limits while shielding upstream equipment from voltage spikes created during braking cycles. In drive systems that feed energy back during deceleration, the filter is installed on the line side so unwanted noise is reduced before it spreads through the incoming supply.

With a protection rating of IP20, the filter must be mounted inside a cabinet where contact protection is required but environmental sealing is not. Its power terminals accept a nominal input of 3 × AC 400–480 V and tolerate a -15% to +10% variation to accommodate common low-voltage networks. Operation is possible on both 50/60 Hz systems, allowing use in different regional power standards without modification. Electromagnetic behavior is classified in the C3 EMC category according to DIN EN 61800-3, which suits installations supplied from a dedicated transformer in industrial areas. Because the internal circuit is engineered for regenerative devices only, the component routes reverse energy from drive inverters back to the mains instead of dissipating it as heat.

The mechanical outline follows Design Version 1, so the mounting pattern and conductor spacing match the first HNF layout. Electrical clearances are organized under Series 01, matching the arrangement used by compatible power modules from the same generation. This layout keeps line-side connections orderly inside the enclosure and maintains the spacing needed for cabinet installation with adjacent power components.