Product Description:

The RZF02.1-4-110 radio interference filter is produced by Bosch Rexroth Indramat for the RZF Line Filters series. As a passive front-end component, it is installed between the plant mains and a frequency converter to reduce conducted electromagnetic emissions that could disturb sensitive automation equipment. The part is sized for converters in the 90 kW and 110 kW power classes and is part of line code 02 with design level 1 in the series. This arrangement helps the filter limit unwanted noise before it reaches other equipment connected to the same power system.

The filter is rated for a three-phase supply of 3 x AC 380 ... 480 V ± 10%, a voltage range that matches typical factory distribution networks. It operates on mains frequencies of 50/60 Hz, and its inductance network is tuned so insertion loss remains effective at the high switching frequencies generated by modern IGBT inverters. When the connected drive switches at 4 kHz, the filter carries a nominal current of 215 A. At 10 kHz, the allowable current is 119 A, and at 12 kHz it is 88 A. The stated degree of protection is IP 20, which indicates touch-safe terminals but no sealing against liquid ingress, so the unit requires cabinet installation.

Permitted service conditions span an ambient range of 0–40 °C, which suits most indoor electrical rooms with forced ventilation. The unit is categorized in environmental class 3K3, covering moderate humidity and low dust concentrations without corrosive agents. At 12.2 kg, the filter has enough copper and ferrite mass to handle the stated current levels while remaining manageable during panel installation. Its operating limits show that higher switching frequencies increase internal losses, which reduces the continuous current the filter can carry. For that reason, the selected drive switching frequency needs to remain consistent with the current rating used in the application.