Reactors also help reduce power line distortion, known as harmonics, by adding impedance to the power system. A reactor can also be placed on the load side of a VFD to help protect motors by acting as a useful buffer in between the drive and motor.
3% impedance line reactors should be used to reduce power line transient voltages caused by capacitor switching, line notching, DC Bus over-voltage tripping and inverter over-current and over-voltage conditions. They improve the true input power factor and reduce cross-talk between drives.
A 3-phase Line Reactor. is a set of three (3) coils (also known as windings, chokes or inductors) in one assembly. It is a series device, which means it is connected in the supply line such that all line current flows through the reactor