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Power Relays, Over 2 Amps

Power relays over 2 amps are versatile devices that can be used in a variety of applications. They are capable of automating electrical operations, controlling current through resistance, and protecting electronic components from power surges. Withstand current ratings between 2 and 10 amps, and up to 500 volts, these versatile units are suitable for use in a myriad of applications.

Applications

Power relays are commonly used in many industries, including automotive, manufacturing, telecommunications, and energy. Automotive applications include engine control systems, airbags, ignition systems, and window and door controllers. In manufacturing, the relays help to automate the process and can be used for controlling various devices, such as switches, heaters, fans, and pumps. Telecommunications uses them to control receivers and transmitters, while energy companies often use them for solar panel system control and metering.

Working Principle

A power relay is an electromechanical switch and consists of three main components: a coil, a switch, and a contactor. The coil is typically an electromagnet that is energized by a current. When the current is applied, the electromagnet attracts the switch, which causes the contactor to close or open. The switch then either completes or interrupts the electrical connection to the load. The contactor typically controls low voltage and can be either a single pole or a double pole contactor.

In a single pole contactor, the contactor is moved by the switch and completes or interrupts one circuit. In a double pole contactor, both the positive and a negative circuit leads are controlled by the switch, which is advantageous in preventing electric shocks. A double pole contactor is therefore an ideal option for controlling high voltage electrical systems.

Relays are also used for many other purposes. For example, they can be used for measuring current and voltage, controlling the flow of energy, providing overload protection, controlling starting and stopping of motors, providing alarm functions, and providing common control functions. In summary, power relays have a wide range of use in the many different industries and applications.