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 ...

In this second application we can use the DPDT switch to choose between 2 different load and have a visual indication of what load is connected. In our case (diagram 1) when there is no voltage ...

In its most basic form, a transfer switch for a 120/240V single-phase service is simply a double-pole, double-throw switch of proper ampere rating with a middle off position (Fig. 1). By design, it is ...

A dual-pole, dual-throw relay is housed inside of an electrical ... In [Maarten]’s case it was a relay that had the right current ratings to switch his PC and Internet modem/router, and in ...

The addition of an extra contact to an SPST switch lets it turn off one circuit and turn on another. This makes it a single-pole double-throw (SPDT) switch. Double-throw switches can make ...

switch rocker mechanism to open or close a circuit commonly used in power strips and appliances Photo and symbol for single pole, double throw (SPDT) toggle switch single pole double throw (SPDT ...

The defrost termination/fan delay control is a temperature-activated, single pole-double throw switch controlled with a remote sensing bulb (Fig. 1). The control can be an adjustable type. One example ...