SEL recommends selecting the SEL-FLT and SEL-FLR Fault and Load Transmitter and Receiver System in place of the SEL-WSO Overhead Wireless Sensor. The SEL-FLT and SEL-FLR system provides higher reliability, availability, performance, and power. SEL will continue to support and warranty the SEL-WSO.
Replacement product: SEL-FLT and SEL-FLR Fault and Load Transmitter and Receiver System
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.