Product Description:

The HNF05.1A-500N-R1000-N-A4-NNNN mains filter is produced by Bosch Rexroth Indramat within the HNF Mains Filters series. As a three-phase line-side component, it attenuates conducted emissions and smooths regenerated energy returned from servo or inverter drives to the supply network. The unit is intended for installations that use regenerative devices only and is classified as design version 1 of the 05 series.

The filter operates on a three-phase input of 3 x AC 380 V −15% … 500 V +10%, covering common low-voltage industrial grids. Within those limits, the mains frequency range of 50/60 Hz allows use in regions with either standard. Its nominal current handling capability reaches 1000 A, so one module can protect sizable multi-drive assemblies without saturation. Electromagnetic compatibility is rated C3 in accordance with DIN EN 61800-3, which indicates use in industrial power-supply environments rather than public networks. The filter has an open-frame IP00 degree of protection, so it must be mounted in an enclosed control cabinet with appropriate touch-safe clearance. The nominal system voltage of 690/400 V aligns with TN or IT distribution schemes used on large automated lines.

A leakage capacitance of 500 nF forms part of the differential-mode damping network and helps divert high-frequency components to ground. At rated voltage, this design limits ground leakage current to < 905 mA, a value that must be considered for protective ground conductors and residual-current devices. Thermal losses produced by series inductors and resistive elements amount to 166 W, so the cabinet ventilation system must remove that heat to prevent excessive temperature rise. The magnetic path includes a measured resistance of 33 µΩ, contributing only a minor voltage drop at full load. The assembly weighs 28 kg, so mounting points may need reinforcement and lifting support may be required during installation.