SEL-551 Гүйдлийн огцом ихсэлтийн хамгаалалт болон дахин залгах автомат
The SEL-551 Overcurrent/Reclosing Relay replaces the many relays, control switches, and wiring required in traditional distribution substation protection and control panels. The relay also replaces line recloser control packages at a fraction of the cost.