AFD3E/AFD3U advance motor protection relay with rated operational voltage up to 690V, current from 0.8A-450A AFD3E : Motor protection for overload, open phase, locked rotor, ground fault with built in thermal memory, manual/auto reset, and fault indication. AFD3U (Enhanced Type): Advanced protection covering all AFD3E functions plus PTC overheat, tE time, undercurrent, unbalance, overtime start, surge current, reverse phase, external/contactor faults, etc. Optional: voltage, current, power, and power factor protections. Features programmable I/O, communication, and fault records.