... multi-function,high torque 3) accurate,stable,vector control 4) CE, SGS, ISO9001 AC drive1. SY-6600 ... output will be 150% when the frequency is 0.5HZ.More powerful when at low rate, ... /LED optional keyboard.Support for uploading and downloading parameters..4. Widely used in:ac drive, Metallurgy, Chemical, ... Cable. Washing. Water supply. Heating.. Sanyu SY6600 0.4~2.2kw economical energy saving AC drive