Abstract :
SOME of the trends in industrial electrical control as exemplified by recent steel mill installations are indicated in the accompanying illustrations. A seven-panel control desk built for use in connection with a 65-panel switchboard may be seen in the upper illustration. This board although only 98 in. long, and 30 in. high in front, accommodates full control for nine large d-c. motors and five d-c. generators, motor controls including reverse, and fine and coarse speed adjustments.
