Relay current plays a crucial role in the functioning of relays, which are widely used in electrical systems to control the flow of electrical power. A relay is essentially an electromagnetic switch that uses a low-power signal to control a high-power circuit. By understanding relay current, one can ensure that relays function effectively without causing any damage to the system. In this article, we will explore the concept of relay current, its types, and its importance in electrical circuits.
What is Relay Current? Relay current refers to the electric current flowing through a relay’s coil or its contacts. It is the defining factor that determines whether the relay will activate or remain in its default state. There are two main types of relay current to consider： Coil Current： This is the current that flows through the relay’s coil when it is energized. When this coil is powered, it creates a magnetic field that either pulls or pushes the relay’s armature, causing the contacts to close or open. The coil current is typically low, as the coil is designed to operate with minimal electrical power.