understanding switch relays： functions, types, and applications
Release time:2025-09-16 12:02:51
A switch relay is an essential electrical component that serves as a bridge between low voltage control circuits and high voltage power circuits. It is designed to allow small electrical signals to control larger current loads, which is why it plays a critical role in automation systems, home appliances, vehicles, and industrial applications. In this article, we will explore the working principle, different types, and various uses of switch relays, highlighting their importance in modern electrical systems.
Working Principle of a Switch Relay
At its core, a switch relay operates as an electrically controlled switch. It typically consists of an electromagnet, an armature, and a set of contacts. The electromagnet is energized when a small control voltage is applied, generating a magnetic field that attracts the armature, thereby moving the contacts to open or close a circuit. This action allows the relay to control a high-voltage circuit with a much smaller control signal. When the control voltage is turned off, the armature returns to its original position, either breaking or completing the circuit, depending on the relay's configuration.
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