Up for sale is a  150hp Allen-Bradley AB 646-PAB78 Manual Autotransformer Starter Switch 480 volt. Cavlon Item # 1755.  Raw weight is 492 lbs. Raw dimensions are 24*48*18.

This solid state soft starter is often known as a reduced voltage or reduced current starter.  It is used to start large 3 phase electrical motors with out the huge momentary load on the electrical supply you get when you just close a contactor.  This is often needed when the source of power is a generator that is not 6 to 10 times larger than the motor. CA Inventory # 6903