30A EMI/RFI power line filter is a desired noise filter to protect the 3-phase 3-wire equipment from the outside interference with excellent attenuation performance. It is suitable for 3-phase motor drive, UPS, packaging equipment, textile equipment, industrial air conditioners, and so on.

Specification

Dimensions (Unit: mm)

Electrical Schematic

Insertion Loss Table (in 50Ω system acccording to IEC/CISPR No.17)

Tips: EMI line filter technical parameter - insertion loss

The most important technical parameter of EMI line filter is the capability to restrain interference, normally referring to Insertion Loss. It’s the ratio between the powers transmitting from interference source to load before connecting filter and after connecting filter, and it uses dB as unit. EMI line filter insertion loss is relevant with network parameter of filter network and impedance of source end and load end. To avoid filtering useful signal, insertion loss should be specified carefully. No matter what EMC standard is in the military use or civil use, it has clear specification for equipment or sub system power line conducting interference level. The difference value between estimated or tested EMI conducting interference level and standard conducting interference level is the minimum insertion loss of requested EMI filter. Yet, it is impossible in actual project to do EMC test for different single equipment, then analyze its conducting interference characteristic, and design the filter satisfying with requirement. The suitable power line filter only needs to be selected according to actual status.