A power relay is an essential component in modern electrical systems, playing a vital role in the automation and control of power circuits. As a type of electromagnetic switch, a power relay is used to control high-power circuits with low-power signals. It allows systems to function efficiently, protect sensitive equipment, and provide safe and reliable operation in various applications, from industrial machinery to home appliances.

What is a Power Relay? A power relay operates on the principle of electromagnetism. At its core, a power relay consists of an electromagnet (coil), a movable armature, and one or more sets of contacts. When an electric current flows through the coil, it generates a magnetic field that pulls the armature, causing the contacts to either close or open. This action controls the flow of electricity through a connected load circuit. The key advantage of using a power relay is that it allows a low-voltage signal to control a high-voltage or high-current circuit, ensuring safe and efficient operation.