Abstract: An aircraft power receptacle protection system is disclosed to protect aircraft from damage from a connected ground power unit. One aspect of the system includes a cable for conducting electricity between a ground power unit and an aircraft that has one or more releasable breakaways that are configured to separate with a determined amount of force. The releasable breakaways are installed inline with the cable and are positioned near the aircraft. The releasable breakaway is light weight and small but is still capable of carrying the required current to the aircraft. Another aspect of the system includes an alarm system for the ground power unit that uses an alarm indicator to alert an operator that the ground power unit is connected to the aircraft. The alarm system can have a aircraft plug with a split connector having to electrically isolated contacts that are connected when the plug is connected to the aircraft receptacle.