Product Description:

The RZM01.1-6-230 is a passive three-phase motor filter produced by Bosch Rexroth Indramat for the RZM Motor Filters series. Installed between a variable-frequency drive and its motor, it softens steep pulse edges before they reach the windings. That reduction in dv/dt helps limit insulation stress, lowers reflected-wave effects on long motor leads, and reduces electrical noise that can interfere with nearby control circuits. The result is smoother current delivery for large induction or synchronous motors used in demanding automation equipment. This behavior is especially useful on installations where the motor cable shares routing space with sensors, communication lines, or other sensitive devices.

This model accepts a line-to-line supply of 3 x AC 380–400 V ±15 %, so it can operate across the input variation commonly found in industrial power systems. Its internal conductors and magnetic components are sized for a continuous phase current of 230 A, which sets the normal operating load for connected motors. The enclosure uses Design 1, the first mechanical and electrical layout in this product group. When the drive switches at 8 kHz, the permissible current drops to 195 A because higher carrier frequency increases losses in the copper and core materials. Total heat dissipation can reach 600 W, so the installation must allow that heat to leave the cabinet through ventilation or another cooling path. This thermal load comes from both winding resistance and magnetic losses generated during pulse-width-modulated operation.

In the RZM Motor Filters series, this unit belongs to Line 1, so its terminal arrangement and mounting footprint follow that production line. Operation is optimized around a carrier frequency of 4 kHz, where the filter can deliver full nominal current while keeping losses under control. For applications that run at higher switching frequencies or use long motor cable lengths, the filter helps keep motor current more sinusoidal and reduces the electrical stress imposed by the inverter output. It can also help reduce audible motor noise associated with steep inverter pulses, especially in systems that spend long periods at steady speed.