Product Description:

The HNL05.1R-0130-N0514-N-A4-NNNW is a liquid-cooled mains choke manufactured by Bosch Rexroth Indramat within the HNL Mains Chokes series. Installed on regenerative supply systems, the unit adds series inductance to moderate line-side current ripple, restrain high di/dt events, and protect converters tied to the grid. By reducing harmonic back-feed, the choke supports stable power quality for drives, inverters, and other motion-control hardware used throughout automated production cells, especially where regenerated energy returns to the mains during deceleration.

This choke is design version 1 and supplies an inductance of 130 µH, allowing it to smooth the steep current edges generated by active front-end rectifiers while carrying a nominal load of 514 A. Thermal losses in air are limited to 1350 W, and the housing has a protection rating of IP00, so it must be mounted inside a cabinet with forced airflow. Its maximum ambient rating of 40 °C sets the temperature range for continuous service. The regenerative supply path allows the choke to handle energy that flows from the drive back to the mains after braking events without introducing unnecessary line disturbance.

Water channels dissipate up to 2400 W of heat, and a coolant filling capacity of 2.5 L provides sufficient volume for closed-loop circulation. When coolant moves at 7 L/min, the internal geometry produces only 0.44 bar of pressure drop, which helps limit pump demand and supports stable coolant flow through the assembly. A normally closed temperature monitoring contact opens at 160 °C to signal an overheat condition to the system controller. For auxiliary control, the built-in microswitch supports a switching current of 1 A and is rated for 250 V AC or 24 V DC, allowing direct integration with relay logic or PLC input cards.