A power line filter is a type of passive component that creates an electronic filter to deliver appropriate frequency characteristics to electrical circuits. Power line filters connect the electronic device with an external line to reduce conducted frequencies like radio frequencies (RFI) or electromagnetic interference (EMI) between the equipment and the connecting power line. This prevents any degradation in the circuit's performance.
What are power line filters used for
Power line filters are useful in emission reduction in switched-mode power supplies or machinery producing steam, smoke or carbon dioxide. These filters are also necessary to decrease levels of electromagnetic interference which may cause undesired behaviour in radio transmission equipment and nuclear operations.
Types of power line filters
Power line filters can be used in single phase, three phase or DC (direct current) power applications, depending on the equipment in question. Electric and electronic devices like switched-mode power supplies, motor controllers, induction cooking and food service equipment make use of single phase filters. Three phase filters are common in frequency converters, motor drives, and machine tools. DC filters are typically found in cell phones, flat screen TVs and electric or hybrid vehicles.
Description:
Two stage RFI filters which provide very high
attenuation in both common and differential mode. Designed specifically for sensitive electronic equipment and applications where interference is frequent and very intensive. A capacitor discharge resistor is included within the design.Electrical connections ...
Description:
General purpose two stage RFI filters incorporating an
earth line choke. These filters are specifically designed to provide high level attenuation to unwanted interference that can occur on all three mains lines. Ideally suited for sensitive electronic equipment that may ...
Description:
RF filters which provide high attenuation in both
differential and common mode. Their extended low frequency performance makes them particularly suitable for industrial frequency converters, motor drives and switch mode power supply applicationsConstructed using a combination of X2 and Y ...
Description:
Schaffner performance FN 343 EMI Filters are compact
in design for easy and fast chassis mounting. Single-phase filters provide an excellentAttenuation performance, based on chokes with high saturation and excellent thermal behaviour. Also feature integrated earth line choke. Rated currents ...
