An Electrical Relay is used to control circuits by opening and closing contacts when prompted by an electrical signal. They operate based on the principle of electromagnetism, where a small current activates an electromagnet inside the relay, which in turn mechanically switches larger currents on and off. This mechanism allows relays to isolate control circuits from high-power circuits, providing protection and enabling automation in different applications.

Attributes:
• Handles different voltage and current ratings.
• Regulates the flow of electricity to the system based on temperature and user input.
• Provides isolation between control and load circuits.

Applications:
An Electrical Relay is used in an air conditioner to facilitate seamless communication and control by managing functions such as pump down, probe fan control, and general system control, which helps maintain optimal performance, temperature regulation, and energy efficiency.