The AES34=3-621-5 is a Liberty AES-Series duplex pump control panel. Built for reliable control of two pumps, with seal-leak and motor-temperature sensing, in sump basins, effluent or sewage pump chambers, and lift stations. It has adjustable motor overloads (set by the installer to the pump's FLA rating), HOA switches for each pump, a connection for motor thermostat circuits (cuts power to the pump if the motor overheats), an adjustable seal-leak sensor that triggers an indicator light and the alarm beacon, green pump-run indicators, a red alarm beacon with audible horn and silence/test switch, and NO/NC auxiliary contacts (5A max). Wired for three-phase power at 208-240-480V, rated 17-23 full load amps (must match the pump), in a NEMA 4X weatherproof enclosure with 3 pilot-duty float switches on a 50' cord.