Protecting the VFD and motor from power surges and transients is one of the most critical priorities while maintaining a drive system. There are several sub-components within the VFD and motor which are sensitive to irregularities in power such as voltage spikes, line distortions, current surges or harmonics.

Different types of reactors and filters are employed to regulate these distortions They are as follows:

• Dv/Dt Filter
• Sine Filter

By using these devices either separately or in combination, the service life of the motor and VFD can be increased. It also improves the system performance and reliability of the drive system. Depending on the output voltage of the motor drive, the cable length and layout are also important factors that influence voltage spikes. The appropriate reactor or filter chosen for the specific cable length can help mitigate this issue.