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Electrical contacts play a vital role in electrical circuits and are key components in electrical equipment. They undertake multiple functions such as current conduction, circuit opening and closing, switching operations, and control signal transmission. As the conductive part of a circuit, electrical contacts allow current to flow when closed, completing the circuit's path. In contrast, in the off state, the electrical contacts interrupt the flow of current, thus disconnecting the circuit. This switching function allows electrical contacts to play a key role in controlling the start and stop of electrical equipment.
Electrical contacts are usually integrated into switchgear and operate manually or automatically to switch circuits on and off. Their state changes not only affect the flow of current, but can also be used to transmit control signals and trigger the operation of other devices or circuits. In addition, electrical contacts are used for the protection of circuits, for example in the event of an overload or short circuit, they may open the circuit to prevent damage to the equipment or circuit.
In automatic control systems, the state changes of electrical contacts can be used to transmit signals to realize the operation of other components in the system, thereby achieving automated control. In sensor applications, changes in the state of electrical contacts may be used to detect changes in environmental conditions or physical quantities and generate corresponding signals. Generally speaking, electrical contacts are indispensable basic components in electrical systems. Through their opening and closing states in the circuit, the control and management of electrical energy are realized.
