A relay electrical diagram is a vital tool in understanding how electrical relays work within various circuits and systems. A relay is an electrically operated switch used to control the flow of electrical current in a circuit. It allows a small current to control a much larger current, offering protection and automation to electrical systems. Understanding relay electrical diagrams is crucial for anyone working with electrical engineering, automation, and control systems. This article explores the fundamentals of relay electrical diagrams, their components, working principles, and applications.
What is a Relay? A relay consists of an electromagnet, a set of contacts, and a spring-loaded mechanism. When an electrical current flows through the relay’s coil (electromagnet), it generates a magnetic field that attracts or repels a movable armature, which then opens or closes the contacts. These contacts are usually divided into two types: Normally Open (NO) and Normally Closed (NC). A Normally Open contact stays open when the relay is not energized and closes when the relay is activated, while a Normally Closed contact remains closed until the relay is energized. Relays are widely used for switching large electrical loads, controlling systems in automation, protecting circuits, and integrating different types of electrical equipment. The relay diagram provides a graphical representation of how these components are interconnected and how the relay operates within a circuit.
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