Product Description:

The HNL05.1R-0182-N0262-N-A4-NNNF is a liquid-cooled mains choke produced by Bosch Rexroth Indramat for the HNL Mains Chokes series. Positioned on the line side of regenerative supply modules, it smooths current, reduces electromagnetic interference, and protects semiconductor bridges against commutation spikes. This placement helps the connected power section see a more stable input condition during both normal acceleration and energy recovery. In multi-axis installations, this type of line reactor also helps reduce stress on upstream mains components by tempering current peaks created by the regenerative front end. The component is design version 1 and integrates an N/C temperature contact that opens when the winding core reaches its trigger point, allowing connected control hardware to remove power before thermal damage occurs.

Its cooling circuit uses liquid cooling through the laminated core, and the device carries an open-frame protection level of IP00, so it must be installed inside an enclosure. The inductive path has a nominal value of 182 µH, which helps limit di/dt under line disturbances, while continuous conduction is rated at 262 A to match medium-power inverter stacks. The integral stainless-steel tank holds a coolant volume of 1.5 L, enough to absorb steady thermal load and keep copper temperature below the alarm threshold during sustained operation. Because the core and conductors are thermally coupled to the coolant path, heat can be removed more evenly than with a purely air-cooled reactor of similar current class. Supplementary switching contacts rated 1 A at 250 V AC or 24 V DC transmit status information to the control system, so an external controller can react to changing operating conditions.

The unit can dissipate 1350 W to ambient air and an additional 1500 W directly to the coolant stream, allowing operation without derating up to a maximum ambient temperature of 40 °C. The N/C sensor trips at a core temperature of 160 °C, prompting shutdown before insulation limits are exceeded. In regenerative supply systems, the choke moderates current flow during both motoring and braking phases, which helps stabilize the DC bus during rapid load changes. The separate air and coolant dissipation paths distribute heat across the assembly instead of concentrating it only in the enclosure air space. This behavior is useful where switching patterns change quickly and the front end must remain electrically stable.