Contactors are nothing more than a coil and a set of contacts. The coil of the contactor can be 24, 115, or 230 V, and even higher depending on the application. The contactor arrangement can be single ...

The Double Pole Single Throw DPST relay is the equivalent of 2 SPST switches (NO Normally Open and NC Normaly Closed) and can be used to switch 2 different loads. As you can see in the schematics ...

A single-pole switch has only two conductor terminals. To one terminal, you connect the supply (hot) wire, and to the other you connect the load wire. All this switch does is interrupt or not ...

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