The Protect RCS TPRe TD battery charger system has been developed and designed to provide high reliability power supply and battery charging capability. Its characteristics have been optimized to secure power for the applications linked to transmission and distribution of electricity. The Protect RCS TPRe TD system is a thyristor-controlled rectifier suitable for charging nickel-cadmium or lead-acid batteries while supplying DC loads. It can also be used without batteries as a direct power supply. Its design is optimized for T&D (Transmission and Distribution) applications.