The M3484 line filter is designed to be used in applications where power electronic devices experience problems from line harmonics,
capacitor switching transients and DC drive notching. Typically, devices with
these problems have overvoltage faults. The problems are more severe when
the devices are in a standby or lightly loaded mode. For this reason, chokes
alone are unable to filter the transients.
The filters require some impedance (at least 5%) between the noise source
and their point of installation for proper filtering. Usually, existing AC chokes
or system transformers provide this impedance