A POWERSTAT® Line Corrector Series is used to correct line voltage variations to maintain constant output voltage or to supply a limited range of variable voltage from a stable a-c source. It consists of an appropriately tapped POWERSTAT® Variable Transformer and one or more fixed-ratio step-down transformers. This combination permits relatively small POWERSTAT® Variable Transformers to control large amounts of current in applications requiring control only over a limited range. Manually operated and motor-driven types are available for nominal 115, 230 and 460 volt; 50/ 60 hertz, single and three phase service. All line corrector models have POWERKOTE coils.
With the exception of type MBLC3270DE which does not have the 5 second speed, all types of the Line Corrector Series are available with motor drives in standard speeds of 5, 15, 30 and 60 seconds for full range travel. Motor-driven models have an MB or MO prefix in the type number and the identical electrical ratings of their corresponding manually operated types. The motors are· rated tor 120 volt, 50/60 hertz single phase inputs with current requirements of 0.3 ampere for types prefixed MD, and 0.4 ampere for those prefixed MB. When ordering, motor-driven types should be prefixed with the desired speed in seconds.