Product Description:

The HNL01.1E-3400-S0202-A-480-NNNN mains choke is produced by Bosch Rexroth Indramat and belongs to the HNL Mains Chokes series. Installed between the utility supply and an AC drive, it adds inductance that smooths phase current and reduces voltage ripple before power reaches the rectifier stage. By limiting steep current changes during switching events, the choke lowers harmonic distortion and reduces electrical stress on drives, cables, and upstream protective devices. This behavior is useful when several inverters accelerate from the same plant feeder, because input current remains more controlled across the shared line. It is commonly used in conveyor systems, machining centers, and assembly equipment where multiple drives operate from one incoming supply.

The electrical interface is rated at 3 × AC 400–480 V, -15/+10%, 50/60 Hz, so the unit can operate on common low-voltage industrial power systems without tap changes. Its enclosure has an IP10 degree of protection, which means the choke is intended for installation inside a ventilated control cabinet where accidental contact with live parts is limited. Because the protection level is low, the unit is not intended for exposed mounting on open machinery or in areas where direct contact is possible. The unit uses a current-compensated winding that helps reduce common-mode noise and keeps leakage flux low during operation. This arrangement is suited to input conditioning on a shared three-phase supply, especially where several drives can influence line quality.

The choke works as a feeding element, which means it conditions incoming power before it reaches the drive's DC link. Placed on the line side of the inverter, it helps moderate current peaks drawn by the rectifier and supports smoother input behavior in shared panels. The unit is identified as Design version 1 and Series 01. These codes indicate the product generation and help match the choke to compatible drive hardware without changing the basic operating role of the component.