1.Long-life and high stability In this episode of the PSDcast, we chat with Oscar Rivera and Rogelio Castaneda, both of Sensata Technologies, about solid state relays and their advantages over electromechanical relays Relays are compact in size and appearance is good. The following are the benefits of static relays. For reed relays, however, the contacts are much smaller and lower mass than those used in electromechanical relays. Especially in safety applications this can be a decisive criterion. The advantages of electromechanical relays can be most commonly seen in heavily populated automation panels. Reed relays, like electromechanical relays, have physical contacts that are mechanically actuated to open/close a path. This also shows the advantages of PLC over programmable Relay. Many electronic designs can take advantage of the improved performance of solid-state relays (SSRs) relative to that of electromechanical relays (EMRs) that perform the same circuit function. These reed relays provided significantly higher levels of reliability that their electromechanical relay counterparts and they were also faster, smaller and required less current. facebook; ... the advance numerical relays are coming and single relay having multiple protections. True. Higher speed devices have several advantages over lower speed ones. The other physical quantities like heat temperature etc. I have worked on the electromechanical relay. An electromechanical relay may feature one or many special attributes. SSRs are faster than electromechanical relays; their switching time is dependent on the time needed to power the LED on and off, of the order of microseconds to milliseconds The electromagnet controls opening and closing of the contactors in the relay. Under normal power system operation, a protective relay remains idle and serves no active function. Coupling relays, highly compact relay modules, and relays for the Ex area also help achieve high system availability. However, they have limitations that restrict their use in some applications. Put simply, an electromechanical relay is a switch. One relay can be used in many ways. An electromechanical relay will usually have only one coil but may have any number of different contacts. Relays also provide protection by detecting electrical abnormalities such as overcurrent, undercurrent, overloads and reverse currents to prevent equipment damage. In 1963 the Bell Telephone company introduced its first reed relay based exchange and in the following years, the uptake of this technology for telephone exchanges increased.