Working processes of modern electrical equipment, engineering equipment, and household appliances provide extensive opportunities for alarm control. The means of implementing automation of security systems can be various, but the basis of the technical base is formed by the relay. An alarm relay is a device with a winding designed to close and open an electrical circuit. This principle is controlled in the most straightforward systems, but the segment is evolving, and more often, coming to market devices of this type, focused on use in certain areas.

The principle of operation of the relay for the security system

The relay design is simple and contains an anchor, electromagnets and connecting fittings with conductors. The armature is contacted when current flows to the magnets, leading to a short circuit. A spring controls the current strength and converts it into mechanical action. The spring directly connects to the armature and regulates the degree of pressure on the contacts. That is, depending on the characteristics of the current — changes in the operating state of the device, as well as control of the target equipment. For example, electromagnetic relay control devices control pump units, boilers and other engineering systems by turning their power components on or off. Additional elements such as resistors are provided for the accurate fixation of circuit signals. And the risk of damaging sensitive devices due to voltage spikes is minimized by using capacitors.