Product Description:

The HNL01.1E-0066-N0365-N-690-NNNN is a mains choke produced by Bosch Rexroth Indramat for the HNL Mains Chokes series. Mounted on the supply side of inverter cabinets, it inserts controlled inductance into a three-phase input so drive systems draw smoother current and generate less differential noise. In automation systems, this helps limit network distortion, softens steep voltage fronts seen by converter rectifiers, and reduces thermal loading on upstream fuses and contactors. The added inductive reactance also helps reduce the effect of high-frequency current components that would otherwise place more stress on line-side switching and protection devices.

The unit accepts a connection range of 3 × AC 380 V -15% to 3 × AC 690 V +10%, allowing one choke to cover several common plant voltages without tap changes. Its open-frame construction carries a degree of protection of IP00, so it must be installed inside an enclosure that prevents accidental contact and keeps debris away from energized parts. The product is built in design 1 and belongs to series 01. These identifiers help match the choke with the correct mechanical layout and magnetic assembly, while the panel enclosure provides the physical protection that the open-frame choke itself does not supply.

The supply system designation is Feeding, which means the choke is intended for the input side of the converter rather than the motor output. It uses a standard lamination stack and standard copper fill, with no added thermal sensors or auxiliary terminals included. This line-side placement introduces impedance where grid harmonics originate, which is different from a DC choke that is installed inside a converter. The straightforward electrical arrangement keeps the current path easy to integrate in cabinets that require predictable source inductance and stable input behavior.