Hubbell's S2MC Solid State Stepless Motor Controls are
ideal for controlling overhauling loads such as lift bridges, bridge
cranes, bucket/grapple cranes, portal/whirly cranes, turbine cranes,
tramways, and coke oven drives.
Utilizing AC induction motors (squirrel cage and wound rotor) the
line of S2MC controllers are available in both primary thyristor (4920
series) and secondary thyristor (4940 series) through 500 hp, or more,
and capable of operating on 208/230/380/460/575, 3 phase VAC, 50/60 Hz.
The line of S2MC controls have been successfully applied on hundreds of
applications for over 15 years.