Product Description:

The NFD01.1-500-180 is a passive mains filter produced by Bosch Rexroth Indramat and assigned to the NFD Mains Filters series. It is installed between the plant’s three-phase supply network and sensitive drive controllers or inverters, where it attenuates conducted electromagnetic interference and limits reactive system noise returning to the utility. By providing this isolation, the filter helps downstream servo drives meet electromagnetic compatibility limits and prevents high-frequency disturbances from affecting neighboring automation equipment.

This model is rated for a continuous load current of 180 A, so bus systems drawing up to that level can be connected without derating. The permissible line-to-line operating potential is 500 V AC, which suits industrial power systems that use higher distribution voltages to reduce conductor size. It is designed for 3 supply phases, allowing balanced suppression of differential and common-mode noise on a symmetrical network. At an ambient temperature of 40 °C, the filter remains effective from DC up to 60 Hz, which covers converter-fed systems as well as standard mains frequency. An enclosure classification of IP10 indicates that large foreign objects are kept out, while the open sides required for bus-bar mounting remain accessible for wiring and thermal convection.

Short overloads can be tolerated at 1.5 × IN for 1 min/h, giving additional headroom during motor acceleration or regeneration without exceeding thermal limits. Dielectric strength is confirmed by a line-to-line test of 2125 VDC for 2 s and by a line or neutral to protective-earth test of 2800 VDC for 2 s; these withstand values confirm insulation integrity. The specified temperature range spans −25 to +85 °C, so the filter can tolerate both cold storage and elevated cabinet temperatures when used within the appropriate installation conditions.