s l SENTRON 3/6 Bus Plug with Optional SEM3™ Package
Figure 7: SEM3™ Controller
The control module houses the controller for the bus plug application, shown in figure 8. The control module also contains a fused
switch that controls power to the SEM3™ controller. This switch is shipped in the ON position, meaning the SEM3™ will turn on when the
plug is installed and the busway is powered. The fusible switch may be used to turn off the controller. Control power for the SEM3™ is
tapped off the bus on the line side of the breakers, so metering continues even when the breakers are in the OFF position.
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