What are relay contacts?

Relay contacts are components that function similarly to switches, enabling or interrupting the flow of electricity in a circuit. However, they operate automatically rather than being controlled manually by a human operator. Relays allow for the control of high power devices using low power signals, making them essential in automation and control systems. When a current flows through the relay coil, it generates a magnetic field that moves a contact arm, either closing or opening the relay contacts based on the design.

In the context of electrical power production, this automatic operation provides benefits such as increased safety and efficiency, as systems can respond to various electrical conditions without direct human intervention. They play a crucial role in protecting equipment, managing load distribution, or executing programmed actions in response to specific triggers in a power system.

The other options provided don't accurately describe the function or nature of relay contacts, focusing instead on other electrical components or devices.