... axial distance between the mounting holes (dimension B).2.Standard rated voltage: 160V or 440V, Values for 220V, 400V, and 660V ... or other voltage may be derived on request. 3.Rated speed: 3000, 1500, 1000, 750, 600, 500, 400, 300 and ... speed regulating under constant torque, lowering down field voltage to make speed regulating at constant output. Speed regulating range: See technical date. The ...