Electromagnetic Relay: Their Types & Working

Relays play a crucial role in the field of electrical engineering, generally acting as switches that control the flow of current in an electrical circuit. One widely used type of relay is the electromagnetic relay,that of which commonly finds use in industrial applications, aviation, and more. In this blog post, we will explore the working principle of electromagnetic relays and the various types that exist on the market.

In their most common form, electromagnetic relays consist of a coil, an armature, and a set of contacts. When an electric current flows through the coil, it generates a magnetic field. This magnetic field then attracts the armature, which in turn moves contacts to make or break an electrical connection based on the resting state of the device. This simple yet effective mechanism allows electromagnetic relays to control large currents or high voltages with the help of a small control signal.

There are several types of electromagnetic relays available, each designed for specific applications. Below, we will take a closer look at a few commonly used types:

• Disc-Type Relay: The disc-type relay utilizes a disc-shaped armature that moves when the coil is energized. This movement causes the contacts to change their position, thus controlling the circuit. Disc-type relays are known for their high switching speed and ability to handle large currents. With these features, such relays are commonly used in applications requiring quick response times, such as protective relaying in power systems.

• Beam Relay: Beam relays are similar to disc-type relays but use a beam-shaped armature instead of a disc. This design offers enhanced mechanical stability and reduced contact bounce. Beam relays are widely employed in telecommunication systems, where they provide reliable switching and signaling functions.

• Restraining Spring Relay: With restraining spring relays, an additional spring is incorporated to provide a restraining force on the armature. This spring helps in maintaining the contacts in their normal position when the coil is de-energized. Restraining spring relays are commonly used in control systems and industrial applications, where it is crucial to prevent accidental contact closures.

• Auxiliary Relay: Auxiliary relays are used in conjunction with main relays to enhance their performance. These relays are smaller in size and provide additional functionalities such as amplification, signal conditioning, or logical operations. Auxiliary relays are often employed in complex control systems and automation processes.

• Rotating Disc Relay: The rotating disc relay utilizes a rotating disc instead of a stationary armature, and the disc is attached to the moving contacts and rotates when the coil is energized. This rotational motion ensures a smooth and reliable switching action. Rotating disc relays are commonly used in applications requiring high-speed operation, such as protective relaying in large power systems.

The versatility and reliability of electromagnetic relays make them indispensable in various industries. They are widely used in power systems, telecommunication networks, manufacturing plants, and automation systems. Moreover, electromagnetic relays have proven to be durable and long-lasting, making them a preferred choice for critical applications.

Whether you are interested in a beam relay, rotating disc relay, disc-type relay, or any other form of electromagnetic relay, look no further than ASAP Integrated Distribution and our unrivaled inventory of items. We stock parts from thousands of leading global manufacturers that we trust, all of which are presented with highly competitive pricing and rapid lead times for your benefit. To request quotes on any items of interest that you come across, fill out and submit an RFQ form as provided on our website at your earliest convenience. Once we have a chance to receive and review a completed request, a member of our staff will contact you in 15 minutes or less to present a tailored solution for your comparisons. Get started today and see why so many customers steadily depend on ASAP Integrated Distribution for their needs!