the importance of electromechanical relays in modern electrical systems
Release time:2025-08-07 09:39:28
Electromechanical relays (EMRs) are essential components in modern electrical systems, playing a vital role in controlling circuits and ensuring the safe operation of various devices. These devices have been in use for over a century and remain relevant today due to their reliability, affordability, and versatility. This article will explore the working principle, applications, advantages, and limitations of electromechanical relays, shedding light on their significance in everyday technology.
Working Principle of Electromechanical Relays
An electromechanical relay is composed of several key parts： a coil, a movable armature, a set of contacts, and a spring. The relay operates based on the principle of electromagnetic induction. When an electric current flows through the coil, it generates a magnetic field that pulls the armature toward it. This movement of the armature changes the state of the contacts, either opening or closing the circuit. The spring ensures that once the magnetic field disappears (when the current stops), the armature returns to its original position, restoring the circuit to its previous state.
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