What is Relay? How it works.? Fully Explained with 3D Animation. Working of Relays

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Transcript

00:00Today, we're delving into the world of relays, essential electrical devices that interpret input signals to control circuit connections.

00:08They serve a crucial role by electrically isolating the controller circuit from the controlled circuit, making them

00:15indispensable across various applications, from motors and compressors to programmable logic controllers,

00:22PLCs, used in industrial processes.

00:25To understand their importance,

00:27let's consider a scenario where a battery-powered circuit activates an LED upon detecting an object.

00:34But what if we want to control a motor instead?

00:38Simply redirecting wires won't suffice due to voltage and current limitations. This is where relays come in.

00:46Relays operate as electrically operated switches,

00:50commonly employing electromagnetic principles.

00:53Comprising an electromagnet, a moving armature, and contacts,

00:58relays work by generating a magnetic field when current passes through the electromagnet.

01:04This field attracts the iron armature, causing it to switch positions and connect or disconnect the contacts, thereby

01:11controlling the circuit.

01:13Understanding relay types is essential. They can be normally open or normally closed,

01:19determining their default state when inactive. Variants like single-pole, single-throw,

01:24SPST, double-pole, double-throw,

01:27DPDT, and others offer versatility for diverse applications, from controlling lamps to reversing motor direction.

01:34However, relays have limitations. High voltages can lead to arcing posing safety hazards.

01:41Additionally, the mechanical nature of relays introduces rebound effects,

01:46impacting components like digital circuits.

01:48Solid-state relays offer a solution with no moving parts,

01:52but integrating components like RC circuits can mitigate issues like arcing and stabilize relay operations. In

01:59summary, relays are versatile components, offering simple yet effective means to control electrical circuits.

02:07While they have limitations,

02:09understanding their operation and employing appropriate solutions ensures their effective use across a wide range of

02:16applications, from simple household appliances to complex industrial systems. Like,

02:22comment, share, and follow for more informative 3D videos.

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