Automatic load disconnection and reconnection, can also control a contactor for larger power handling capability.
120 VAC, 1800 VA / 1800 W / 12000 BTU / 1 HP, 60 Hz
220 VAC, 4400 VA / 4400 W / 36000 BTU / 3 HP, 60 Hz
220 VAC, 3600VA / 3600 W, 60 Hz