Small Case VersionThe 008-120-11 series of alternators were designed for automatic duplex control of motors and other types of loads. They are available in a single phase voltage of 120 VAC. When power is applied to the alternator, the cross-wired DPDT output relay contacts change state each time the control voltage is disconnected. The "SP" Version has two options: (1) a lead/lag/automatic selector switch and (2) a push-to-test switch for added convenience in testing or trouble shooting.
A single phase AC line and properly rated light bulbs are needed to test any alternator in the M.P.E. product line.