The system includes line-powered SEL-FT50 Fault Transmitters communicating wirelessly with an SEL-FR12 Fault Receiver over 4 miles. The system communicates the fault data using high-speed Mirrored Bits communications to any SEL device—in less than 6 ms.

Fast detection and communications enable coordination tailored to specific events. This allows you to trip on faults as fast as possible and to selectively decide when reclosing should be enabled, improving safety and reducing wear on equipment. You can install the SEL-FT50 Fault Transmitters on laterals, branches, and the main line to provide additional information for protection decisions. When combined with the SEL-651R Advanced Recloser Control or other SEL distribution protection relays, the SEL-FT50 and SEL-FR12 System makes new protection schemes possible.