The 1321-RWR12-DP reactor is a line reactor whose main function is to condition the output power of Variable Frequency Drives (VFDs) so that the excessive over-voltages normally produced in the inverter section of those devices can be reduced and kept under control. These over-voltages normally occur as a result of using Insulated Gate Bipolar Transistors (IGBTs) for Pulse Width Modulation (PWM), and they can potentially lead to electrical arcs known as partial discharges (or a corona effect) in the windings of the motors, and they damage the insulation and rendering the machine systems unusable. Neglecting to use line reactors such as the 1321-RWR12-DP line reactor can also accelerate the deterioration of the drive’s electronic components as a result of the reflected wave phenomenon, in which high spikes of energy are reflected to the drive because of the different impedances of the motors and their corresponding wiring.

Line reactors like the 1321-RWR12-DP reactor are designed to reduce the effects of the accumulation of energy in the cables and windings of the motors driven by the new generation of VFD’s that use IGBT’s because of their limited power consumption and faster switching capabilities. These IGBT’s are so fast at switching drives on and off that there is not enough time for the system to adjust to the new electrical requirements by charging and discharging as a regular capacitor would do. Installing a 1321-RWR12-DP line reactor at the output of the VFD will help to reduce the over-voltages applied to the cables and the motors, therefore controlling the appearance of reflected waves in the system. The 1321-RWR12-DP line reactor is recommended for handling a fundamental current of 12 Amps, as shown in the product’s catalog and related technical documentation. The installation of the 1321-RWR12-DP line reactor is very straightforward because the reactor is provided with integrally mounted terminal blocks and it comes with clear instructions for a simplified installation process by a qualified technician.