Relays are essential components in electrical and electronic systems, providing a means to control high power circuits using low power signals. They are widely used across various industries, from automation and telecommunications to protection systems and industrial machinery. In this article, we will explore the different types of relays, their working principles, and their applications.
What is a Relay? A relay is an electrically operated switch that allows one circuit to control another. It typically consists of an electromagnet, a set of contacts, and a spring mechanism. When an electrical current flows through the coil of the relay, it generates a magnetic field that either opens or closes the contacts, allowing or interrupting the flow of current in the controlled circuit. Relays are commonly used for switching tasks in various applications, including automated control systems, safety devices, and industrial machinery. Their role is critical in circuits where low-voltage signals are needed to control higher-voltage operations.