Cdg34 relay manual2/27/2023 ![]() Static relays have no moving parts (hence the name) and operated on the basis of analogue circuitry. While still being reliable and widely used these were superseded by static relays in the early 1980s. ![]() Mechanical relays developed in the 1800s were the first form of electrical protection. ![]() While over recent years these have been replaced by microprocessor based numerical devices, there are still many older electromechanical relays in service. Electromechanical relays have been the traditional backbone of electrical protection systems. ![]()
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