Sukhnandan Enterprises

AC line reactors are added to the input of the drive and placed in series with the incoming line. They help to mitigate harmonics and because they are between the line and the drive, they are able to act as a buffer for surges and other transients. The intended purpose of a line reactor is not to offer high levels of surge protection and, if greater protection is desired, a dedicated protective device such as a metal oxide varister (MOV) or a transient voltage surge suppressor (SPD) is a much better solution. The disadvantage of an AC line reactor is that they are normally larger than DC chokes and typically more expensive.