text: <s>[INST] Line reactors Summary: Motor sizeGood day, 1. What size of the motor do a connect reactors on the input and out of VSD? 2. The line reactors have two ratings e.g A1 & A2 = 80A and B1 & B2; Ith = 120A and what this means? M. Mahao [/INST] Hi, if I get your question right, the side depends on your particular installation or application. Basically you utilize a reactor connected to the input of your VFD to help to protect your VFD against disturbances of your power line and also to reduce the total harmonic distortion in the line introduced by the VFD. Basically you utilize a reactor between the VFD output and the motor to protect your VFD against reflected waves in installations where the motor and the VFD are “far” from each other and also to protect some motors from non-sinusoidal wave forms. There can be some other reasons why you want to use a reactor. If you utilize an input reactor connect A1, B1 and C1 to the line and A2, B2 and C2 to the VFD input terminals. If you utilize an output reactor, connect A1, B1 and C1 to the VFD output terminals and A2, B2, C2 to the motor In your case 80A is the rated fundamental amps and Ith = 120A is the max amps Hope this helps Bye \\n </s>