Relay circuit design is an essential aspect of electrical engineering, used for controlling high-power electrical systems with low-power control circuits. A relay, as an electromechanical device, is widely used in various applications to open or close electrical contacts under specific conditions. This article delves into the fundamentals of relay circuit design, its components, operation principles, and key design considerations.
What is a Relay? A relay is an electrical switch that is operated by an electromagnet. It consists of a coil, which, when energized, generates a magnetic field that causes the relay’s contacts to open or close. The relay can be used to control a high-power circuit with a low-power signal, which is ideal for protecting delicate components or handling high-voltage applications. The relay has two main parts： the control circuit and the switching circuit. The control circuit energizes the relay coil, and the switching circuit includes the contacts that control the connected load. Types of Relays
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