The large thermal power plant involved in this project has multiple generator sets, each equipped with a DCS system for monitoring and controlling the generator set systems. However, due to the large number of electrical devices and complex loads, the requirements for relays are also higher. Shenglan relays, with their compact size, stable operation, and fast response speed, have become a very important component of the DCS control system in this thermal power plant, enabling precise control of the generator set circuits and ensuring their normal operation.