Product Description:

The HNF05.1A-500N-R0600-N-A5-NNNN is a three-phase mains filter produced by Bosch Rexroth Indramat within the HNF Mains Filters series. Classified as design version 1, it is wired between the plant supply and regenerative drive controllers of Series 05 in order to attenuate conducted interference and comply with electromagnetic compatibility limits. By conditioning the current returning from energy-recovering inverters, the filter helps maintain grid quality, prevents high-frequency noise from propagating to other equipment, and protects upstream circuit breakers from unwanted tripping during regenerative operation.

Its electrical frame is sized for a nominal line voltage of 690/400 V, allowing the same unit to serve both 690 V power systems and common 400 V industrial buses. A continuous load of 600 A can pass through the copper busbars without exceeding thermal limits, while harmonic suppression remains effective across the fundamental grid range of 50/60 Hz. The core is wound for a symmetrical, three-conductor arrangement and therefore expects a 3 × AC supply. Internal losses are limited to 86 W, so cabinet air conditioning only needs to remove a modest heat load during full-current regeneration.

Additional parameters describe its performance at higher frequencies. The differential leakage path uses a capacitive network of 500 nF, which shunts radio-frequency energy back to the source without affecting the fundamental waveform. Series impedance derives mainly from a winding resistance of 52 µΩ, which keeps insertion voltage drop negligible. The open design carries a protection classification of IP00, meaning it must be mounted inside a grounded enclosure. At 22 kg, the unit remains manageable during installation, and the C3 EMC category confirms suitability exclusively for regenerative devices in industrial environments.