What Are Electrical Relays And Solid State Relays?
An electrical relay is a type of switch controlled by a different circuit. A really good example is the start-up system of a car. As soon as you turn the ignition key, the ignition doesn't actually work with the car battery. What it does is activate an electrical relay and this passes a signal to make the car start. They set up Electrical relays and solid state relays in this way for a range of different reasons.
The very first ones were actually invented around 1830, when switches were first understood. In those days, they included electromagnets and these are still used in modern electrical relays. However, in solid state relays, the electromagnetic relay parts do not move. Furthermore, in electromagnets, you can conserve more energy than in a solid state model.
Electrical relays are very popular in engineering field. This is because it is possible to control an electrical output that is far higher than the current it is receiving. Going back to the car ignition, if you connect the ignition straight to the battery, the steering column would then be connected directly to the ignition through heavy-duty insulated wiring. Making sure the ignition switch itself is sturdy.
If instead you use socket relays or electrical relays, you can use the wiring that is far more lightweight, which means you save space and the vehicle is actually a lot safer. You can use solid state relays for a whole range of circuits, such as amplifiers or alarm switches.
For instance, if a burglar tries to cut the wires on an alarm, the alarm will actually be triggered through the relays. They can also be installed to switch on or off if there is an irregular current or a current overload. They are tripped to actually switch an entire system down to make sure that you can fix the problem.
Electrical relays can also be purchased as hobby items. A lot of people want to know how solid state relays work and buy socket relays and other parts at science stores. These only work on small batteries, so that nobody accidentally electrocuted themselves. Of course, it is possible to also buy more advanced models that you can use to build entire switches and then also the industrial versions.
These are specifically made to handle heavy currents and power and are available for all sorts of applications. For instance, railway control and signaling or factory power loads all use electrical relays. All in all, they are incredibly useful engineering pieces of equipment that allows us to use our electrical processes in a very safe way, while at the same time conserving space and energy.