Product Description:

The HNL05.1R-0040-N1019-N-A4-NNNN is a mains choke produced by Bosch Rexroth Indramat for the HNL Mains Chokes series. As a design version 1 component, it is installed on regenerative supply lines to smooth current waveforms and limit harmonic content before energy returns to the grid. No additional options are configured on this model, so integration relies on the base unit. Within an automation cabinet, it is treated as open-frame equipment because its degree-of-protection rating leaves the windings exposed for forced-air cooling.

The choke has an inductance of 40 µH, which helps counter high-frequency switching edges from the converter. It is engineered for a nominal line current of 1019 A and accepts a supply built on 3 × AC phases, so conductor sizing and busbar design must suit that high continuous load. Because the laminated core is unenclosed, its overall protection remains at IP00, restricting installation to grounded, finger-safe compartments. Heat produced by copper and iron losses reaches 850 W under rated conditions; this value indicates the airflow that cabinet fans or ducting must provide. Control wiring also ties into a normally closed temperature contact, and the auxiliary circuit can interrupt a 1 A signal at 24 V DC when internal winding temperatures rise.

The temperature contact trips at 160 °C; once reached, the N/C sensor opens to notify the drive of an overtemperature event. Continuous operation is permitted only up to a maximum ambient temperature of 40 °C, so the enclosure must prevent overheating during high ambient conditions. Handling and mounting hardware must account for a mass of 121 kg, with lifting eyes or hoists used to position the choke without deforming the frame. For interlock circuits on the cabinet door or an emergency-stop circuit, the auxiliary microswitch can also switch up to 250 V AC, allowing direct connection to standard control relays.