What Is A Selector Switch Used For? A selector switch is a device that's manually rotated to activate electrical contacts. Selector switches typically comprise a contact block holding a spindle/rotar with a protruding spock and a rotary knob attached to the spindle/rotar. Inside the contact block sits an array of terminals. How do selector switches work? Selector switches are typically located in front of a control panel. They have a broad range of potential contact combinations. When the array knob is twisted, the spindle rotates, and the protruding Spock latches onto the desired terminal, causing a change in the electrical state of the system. Contact position on a selector switch can easily be illustrated using truth tables. Selector switches are normally used to select either two or three different circuit conditions. Two-position selector switch A two-position selector switch has only two contacts, and the positions of the switch can be manual or automatic. If the switch position is switched to manual, one of the contacts is closed, and the other is one. When the switch position is switched to auto, the other contact is closed, and the first contact is open.
Three-position selector switch In three position selector switches, there are three ways to choose from i.e., a manual position, an off position, and an automatic position. In the manual position, one of the contacts is closed, and the other is open. At the off position, both contacts are open. With the switch set to auto, the first contact is set to open, and the second contact is closed. Selector switches can also be classified according to the length of the handles as either longhandle selector switches or short-handle selector switches. The former offers better handling but is not the best option if you want something on the inconspicuous side. Additionally, you can pick between maintained and momentary selector switches. The handles of maintained selector switches can be locked in a position whilst those of momentary selector switches automatically revert to the default position when let go. These switches can also be illuminated or non-illuminated. Illuminated selector switches have doit, ring, or full LED illumination to emphasize the 'ON' position. Applications of selector switches Selector switches are typically used in the following applications in industrial and domestic setups:
● Electrical circuits: In electrical circuits, selector switches can be used to switch between power sources, direct the flow of current, adjust the amount of current passing through heating elements, control motor speed, etc ● Electronics. Selector switches can be found in consumer electronics such as AC units, radios, old TVs, etc ● Providing electrical connection to a circuit or groups of circuits in a variety of industrial automation applications That's it, folks. Selector switches are simple but provide a unique control system when more than one control option is needed and when a maintained contact is needed. If you like the above guide on selector switches and want to order some for your project, we carry a huge inventory of ready-made selector switches that are tested and proven to work as expected. Feel free to browse our product catalog to find one that suits your application, We also build custom-made selector switches using our massive supply of components. Whatever switch design you have in mind, we can assemble and ship your order the very same day you place it, irrespective of the quantity required. Let us know what you need, and we'll be happy to oblige.