Product Description:

The HLL05.1W-600U-G0350-N-D7-NNNN-NNNN is a bus choke produced by Bosch Rexroth Indramat within the HLL Bus Chokes series. In a DC link, this component limits current ripple and reduces voltage peaks that could stress power semiconductors, so it is installed between an inverter and the common DC bus of a multi-axis industrial automation system. Its design requires installation inside a dedicated control cabinet, where surrounding equipment can be protected from the magnetic field and thermal load generated during operation. The cabinet also prevents accidental contact with the choke and provides a controlled location for its electrical and cooling connections.

The magnetic circuit operates at a nominal DC bus voltage of 750 V DC, making the choke suitable for drive systems that use standard 600 V AC mains after rectification. Thermal energy is removed through water cooling, and the closed cooling circuit prevents the coolant from contacting ambient air. This arrangement helps protect the coolant from airborne contaminants that could obstruct narrow passages or reduce heat-transfer performance. The module works with the external capacitor assembly coded HAS04.1-003, and its internal layout is matched to four capacitor pairs so the DC-link resonance frequency remains below the switching frequency of modern IGBT inverters. Water is the only permitted coolant because other fluids could cause corrosion or electrical conductivity problems. A control cabinet is therefore required to accommodate the plumbing, secure the cooling lines, and provide suitable leak monitoring around the open-frame assembly.

Installation clearances are influenced by the IP00 enclosure rating, which indicates that live parts are exposed and must be shielded by the surrounding panel. The integrated temperature contact is rated for 250 V AC or 24 V DC and uses a normally closed contact that opens when the winding reaches 160 °C. This contact provides the drive controller with a discrete fault signal, allowing power to be interrupted before excessive winding temperature damages the choke or nearby components. During heavy load cycles, the assembly can exceed a sound pressure level of 85 dBA, so appropriate acoustic damping or hearing protection may be required in nearby service areas. Wiring must maintain suitable conductor spacing for the contact voltage ratings, while the cabinet interlock must prevent access to energized components.