The Type 4292 Yardmaster Controllers incorporated
heavy-duty time proven components arranged to provide optimum control of
your lifting magnets.
A mechanically rugged high thermal capacity discharge
varistor assembly is permanently connected in parallel with he magnet and
provides a safe discharge path for the stored magnetic energy. With
Yardmaster magnet controllers, induced voltage cannot return to the line,
permitting rectified power supplies to be used without the added expense of
special protective loads or bypass circuits.