Product Description:

The HNL05.1R-0100-N0811-N-A4-NNNF is a liquid-cooled mains choke produced by Bosch Rexroth Indramat within the HNL Mains Chokes series. As a line reactor, it is installed between the utility feed and regenerative drive modules to reduce current ripple and limit inrush transients. By increasing source impedance, the choke helps shield sensitive inverters from grid disturbances and contributes to lower harmonic distortion in industrial automation networks.

In design version 1, the choke has an inductance of 100 µH, which smooths the DC link without excessive voltage drop. The laminated core and copper windings accommodate a nominal line current of 811 A, and the open-frame build has a protection rating of IP00, so it must be mounted inside a closed control cabinet. During continuous operation, the device loses 1650 W with air cooling and 3000 W when connected to the water circuit, while the 3.6 L fill capacity supports stable flow. At 7 L/min, the hydraulic circuit introduces only 0.07 bar of pressure drop. A normally closed thermal contact is fitted, and the auxiliary microswitch handles 1 A at 250 V AC or 24 V DC for overtemperature signaling.

With a mass of 180 kg, the choke is intended for floor or frame installation close to the regenerative converters it supplies. The cooling system and conductor insulation allow reliable service up to a maximum ambient temperature of 40 °C, and if the internal hot-spot temperature reaches 160 °C, the thermal switch opens the control circuit. The device operates on a Regenerative supply system, which allows braking energy from connected drives to flow back toward the mains through the reactor without pushing it into magnetic saturation. The pressure-tight water jacket supports this operating mode while the switch current and voltage limits remain unchanged.