Product Description:

The HNL05.1R-0346-N0238-N-A5-NNNF is a line choke manufactured by Bosch Rexroth Indramat within the HNL Mains Chokes series. Installed between a regenerative drive and the plant power supply, it adds controlled inductance to smooth line current, reduce harmonic feedback, and limit switching transients that can travel back into connected equipment. By placing impedance ahead of the drive input, it helps stabilize supply behavior during rapid acceleration and regenerative braking events. It also reduces inrush current during power-up, which helps protect components in motion-control cabinets.

The choke is rated for a continuous line current of 238 A, which is the maximum continuous RMS load it can carry. Its iron core has a nominal inductance of 346 µH, which adds impedance that helps filter high-frequency ripple on the power line. The enclosure has a protection class of IP00, so the installed device requires proper guarding against accidental contact. Line isolation uses an AC switch limited to 250 V, and supervisory electronics supply the temperature contact from a 24 V DC source. That contact supports a 1 A switching capacity, uses a normally closed arrangement for fail-safe monitoring, and the component is supplied as design version 1.

Heat is removed through an internal channel for liquid cooling. When only cabinet airflow is available, the windings can dissipate up to 1300 W; when water flows through the cooling channel, permissible dissipation increases to 1400 W. This cooling path provides additional thermal headroom during repeated energy regeneration and sustained load conditions. A thermal switch embedded in the winding stack opens at 160 °C, giving the control system an overtemperature signal before the insulation is overstressed. The unit is intended for regenerative supply systems where deceleration energy can flow back toward the grid.