Relays are essential components in modern electrical and electronic systems, acting as remote-controlled switches that enable the automation of various processes. The concept of relay voltage is central to the operation of these devices, determining how they respond to control signals and switch loads effectively. This article aims to provide a comprehensive understanding of relay voltage, its significance, and its applications in different settings.

    At its core, a relay consists of an electromagnet, a set of contacts, and a spring mechanism. When voltage is applied to the relay's coil, an electromagnetic field is generated, causing the armature (a movable metal lever) to change its position. This action opens or closes the contacts, allowing or interrupting the flow of electricity to the connected load. The voltage supplied to the coil, known as relay voltage, is critical for controlling this process.