base inertia;† minimum simulated inertia; maximum simulated inertia; continuous rated power, absorbing mode; continuous rated power, motoring mode; torque range, absorbing and motoring, sometimes in the form of tractive effort at base speed; number of rolls; roll diameter with tolerance (typically <±0.005 inch on a 48-inch roll); roll concentricity (typically < ±0.1 mm (0.004 inch) on a 48 inch roll); maximum surface speed (km/hour); maximum permitted acceleration; maximum time to stop from maximum rated speed under regenerative braking; type of drive protection system (supply failure during full regenerative load, etc.). These parameters determine the basic geometry of the rig and the size of motor and its associated variable speed drive system.
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