Single pole means that it can only control a single circuit, and single throw means that there are only two positions the switch can be in (one on, and one off state). Mechanical relays do not ...

Frame relay switches interconnect via point-to-point lines or an ATM backbone. Frame relay provides Permanent Virtual Circuits (PVCs) and Switched Virtual Circuits (SVCs). They are logical ...

The speed fan switch then directs the voltage to ... supplied through a separate leg of the blower motor fan circuit and a heavy-duty relay. Resistors are just that: they resist the flow of ...