web site: www.mtecorp.com e-mail: [email protected] (800) 455-4MTE fax: (262) 253-8222 MTE three-phase AC reactors are not just for use with AC variable frequency drives. Use MTE reactors on the input of DC motor controllers to provide protection for the drives, and improve the quality of power supplied to other loads on the distribution system. To reduce the "notching" of the supply voltage that will be caused by a three- phase DC motor drive, apply a 3% impedance MTE reactor to the drive input. > Selection of MTE reactors for DC drive input applications of lower horsepower are made directly from the MTE reactor selection table. Because higher horsepower DC drives may demand more line current than AC drives of the same HP, these applications should use the reactor for the next larger horsepower rating on the chart. The DC motor drive applications (3-phase supply) for which the next larger reactor should be considered are: 600 Vac, > 75 HP DC 480 Vac > 100 HP DC 208-240 Vac > 20 HP DC For example, to select a reactor for a 200 HP DC drive application supplied by 480V 3-phase power, simply use the 3% impedance selection from the table for 480V, 250 HP. If a mathematical method of selection is desired, one is presented below. >