What is a Relay?
Relay exists in a lot of electronic devices available these days from television, video games console, fan, lamp and a lot more. Relay can be illustrated as someone passing something to you and you keep going until the thing has reached the end. As if, you wanted to watch television and you pressed the remote which acts as the input. The input will then transfer as an electric signal to the output which will activate the relay and turn on the television. The relay itself is an activator which will translate incoming electric signals to any electrical appliances that require another input which is an example,a remote. Relay is required to control another flow of electricity required to turn on anything that you wanted. Omron relay is commonly used in everyday devices.
Type of Relay
There are different types of relay for specific devices. The first is relay with contacts. Related to the name, the relay has contacts and uses an electromagnetic operation to mechanically open and close these contacts to transmit and cut signals, current or voltage. Next one is relays without contacts. These relays do not have a mechanical part like the first one. However they are made up of internal triacs, resistors, or other semiconductors and electronic parts that transmit and cut the signal or power electronically by the operation of these electronic circuits.
Last but not least is hybrid relays. This relay is the combination of both previous relays. Semiconductor elements will transmit and cut the signal or power and contacts are used to supply the power of the relay.
Same as the type, there are 3 major structures of relays that can be classified. The first one being hinged relays. The amature of the electromagnet rotates around a fulcrum. This action directly or indirectly pens and closes a contact. Second is the plunger relays. Plunger relays use mainly the power of a plunger-shaped electromagnet as the armature section to open and close contacts. Lastly is the reed relays. Reed relays consist of a pair of magnetic strips sealed within a glass enveloped. These reeds are the contacts. Magnetic flux applied to a coil wrapped around the glass envelope moves these reeds, which opens and closes the contacts.