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标题: Relay Operation Guide: Essential Steps for Installation, Operation, and Maintenance Relays are fundamental components in electrical systems, serving as electrically operated switches that control circuits without requiring direct human intervention. The Relay Operation Guide provides a comprehensive framework to ensure the proper selection, installation, operation, and maintenance of relays, thereby safeguarding equipment and optimizing performance. Understanding the basic principle of relays is the first step for anyone working with them. A relay operates by using an electromagnet to mechanically move a switch. When current flows through the coil, it generates a magnetic field that attracts the armature, closing or opening contacts depending on the relay type. This mechanism allows low-power signals to control high-power circuits safely and efficiently.