understanding relay current： key concepts and applications
Release time:2025-11-17 19:06:30
Relay current plays a vital role in the functioning of relays, which are essential components in electrical circuits for controlling large currents with small control signals. A relay uses electromagnetic forces to switch between circuits, allowing a low-power control system to manage high-power devices. In this article, we will explore the concept of relay current, its types, and its various applications in modern electrical and electronic systems.
What is Relay Current?
Relay current refers to the electrical current passing through a relay, typically in two forms： the current that activates the relay (the coil current) and the current passing through the relay contacts when they are in the "closed" position, controlling an external load. The relay itself is a type of electrical switch that uses an electromagnetic coil to operate its internal contacts. When an electric current flows through the coil, it generates a magnetic field that causes the relay's switch to change state. This, in turn, allows or interrupts the flow of current in another part of the circuit, typically in a high-power application.
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