K-Tec Ground Fault Relay Gfr3001 $1,429.89 https://www.ebay.com/itm/154499203794?hash=item23f8dec2d2:g:…
Eaton / Westinghouse 1257C88G03 Ground Fault Relay Sensor $1,409.92 Eaton https://www.ebay.com/itm/153449338818?hash=item23ba4b17c2:g:…