Product Description:

The NFD03.1-480-180 is a three-phase mains filter manufactured by Bosch Rexroth Indramat and supplied within the NFD Mains Filters series. Installed upstream of drive controllers, the unit suppresses conducted electromagnetic interference and limits line-to-ground leakage currents. By attenuating high-frequency noise before it leaves the cabinet, the filter helps automation systems meet EMC regulations and shields sensitive logic from switching transients generated by inverters and servo amplifiers. It is intended for placement inside distribution enclosures and forms part of the protective network that also includes circuit breakers and contactors.

The filter carries a continuous line rating of 180 A, allowing multiple high-power axes to share a single supply without overloading the choke section. It tolerates up to AC 480 V +10% on the mains terminals, and its LC network is designed for grids operating at 50/60 Hz. Compatibility with a three-phase topology means the unit can be used on standard industrial feeds without derating. Under nominal load, the components dissipate 61 W of heat, so forced ventilation is recommended. Power enters through copper lugs sized to AWG 4/0; the corresponding EK and RK blocks each provide 95 mm² of clamping area and are tightened to 20 Nm. A plated M10 ground stud, secured at 18 Nm, establishes the protective earth path and minimizes common-mode noise.

The housing follows a vertical construction scheme that simplifies convection flow. Panel builders allocate space based on an overall height of 350 mm, a front width of 130 mm, and a depth of 180 mm, allowing the unit to fit beside larger inverters without encroaching on cable ducts. Transport and installation are manageable because the assembly weighs only 10 kg. These dimensions give adequate clearance for bending high-current conductors while still leaving the top surface open for service access, and the rigid steel frame keeps the internal inductors aligned during vibration encountered in machine bases.