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this is a motor starter the top portion is called the starting contactor its a special-purpose relay whose contacts are designed to operate a certain horsepower motor just a minute well take a look at the nameplate and see exactly what that is for this particular starter so on the inside of this top section well find a relay and contacts when the relay is energized the contacts go close to start motor down below this section is called the overload section we have three separate what we call heaters and well take a closer look at these individual heaters and talk about how we sized those particular heaters so if the motor draws more than what more current than what its rated for for a period of time the overloads will operate to de-energize the coil in the starting contactor and stop the motor the red lever is far the is actually a push button that allows us to reset the overloads in the event that we do have a an overload trip on the motor on the top portion we can see the where