understanding the electromechanical relay: function, components, and applications
Release time:2025-06-16 19:51:45
An electromechanical relay is a type of electrical device that is widely used to control a circuit by opening or closing its contacts in response to an input signal. This device uses electromagnetic principles to carry out its task, making it one of the most important components in various electrical and electronic systems. In this article, we will explore the working mechanism of an electromechanical relay, its key components, and the many applications it serves in both industrial and everyday settings.
How Does an Electromechanical Relay Work?
The fundamental operation of an electromechanical relay revolves around the electromagnetic induction principle. When an electric current flows through the relay’s coil, it generates a magnetic field that attracts an armature, which is a movable metal part inside the relay. This attraction causes the armature to move and engage or disengage contacts in the relay’s circuit. Depending on the design, these contacts can either be normally open (NO) or normally closed (NC).
Normally Open (NO): When the relay is not energized, the contacts remain open, and no current flows through the connected circuit. However, once the coil is energized, the magnetic field pulls the armature, causing the contacts to close and allowing current to flow.
Chat Oline