... speed by changing the motor rotor resistance wound motor speed control device I, mainly features:1. Starting current is small, ... installation and maintenance are convenient.II, Application:Applicable to three-phase AC 380V 660V, 3KV, 6KV,10KV drag fan and pump ... , about laden wound rotor type asynchronous motor soft starter and control surging currentIII, How to order,1, Model of motors, rated ...