A charger extension cable for an electric car is connected with a home circuit and a charging gun of the electric car, and the charger extension cable contains: a body. A plug connects with a home circuit, and the plug connects with an electromagnetic protection switch via a first extension part, wherein an output end of the electromagnetic protection switch connects with a measuring meter, and an output end of the measuring meter couples with a first socket via a second extension part, the first socket is applied to connect with the charging gun.

A charger extension cable for an electric car is connected with a home circuit and a charging gun of the electric car, and the charger extension cable contains: a body. A plug connects with a home circuit, and the plug connects with an electromagnetic protection switch via a first extension part, wherein an output end of the electromagnetic protection switch connects with a measuring meter, and an output end of the measuring meter couples with a first socket via a second extension part, the first socket is applied to connect with the charging gun.

An intelligent leakage current detection and interruption device for a power cord, including a switch module configured to control electrical connection of first and second power lines between input and output ends; a leakage current detection module, including first and second leakage current detection lines coupled in series, configured to detect a leakage current on the first and second power lines, respectively; a detection monitoring module, coupled in series to the first and second leakage current detection lines and to the first and second power lines, configured to detect an open circuit condition in the first or second leakage current detection line; and a drive module, coupled to the switch module, the leakage current detection module and the detection monitoring module, configured to drive the switch module to cut off power to the output end in response to any detected leakage current or open circuit condition.

An intelligent leakage current detection and interruption device for a power cord, including a switch module configured to control electrical connection of first and second power lines between input and output ends; a leakage current detection module, including first and second leakage current detection lines coupled in series, configured to detect a leakage current on the first and second power lines, respectively; a detection monitoring module, coupled in series to the first and second leakage current detection lines and to the first and second power lines, configured to detect an open circuit condition in the first or second leakage current detection line; and a drive module, coupled to the switch module, the leakage current detection module and the detection monitoring module, configured to drive the switch module to cut off power to the output end in response to any detected leakage current or open circuit condition.

A smart plug system is disclosed. The smart plug system includes a power plug configured to receive an alternating current power signal from shore power, a power receptacle configured to receive a plug having a plug blade, and a plug detection switch configured to detect receipt of the plug blade in the power receptacle. A rectifier circuit is included to rectify the alternating current power signal received at the power plug when the plug detection switch is actuated by receipt of the plug blade. The plug detection switch is further configured to prevent rectification of the alternating current power signal by the rectifier circuit when the plug blade is removed from the power receptacle. A logic level converter is included to receive the rectified power signal to convert the rectified power signal to a logic level signal.

A smart plug system is disclosed. The smart plug system includes a power plug configured to receive an alternating current power signal from shore power, a power receptacle configured to receive a plug having a plug blade, and a plug detection switch configured to detect receipt of the plug blade in the power receptacle. A rectifier circuit is included to rectify the alternating current power signal received at the power plug when the plug detection switch is actuated by receipt of the plug blade. The plug detection switch is further configured to prevent rectification of the alternating current power signal by the rectifier circuit when the plug blade is removed from the power receptacle. A logic level converter is included to receive the rectified power signal to convert the rectified power signal to a logic level signal.

An earthquake sensing module includes an acceleration sensor configured to detect accelerations on a plurality of detection axes, a module control unit configured to control the acceleration sensor, and a module storage unit configured to store state information of the acceleration sensor.

An earthquake sensing module includes an acceleration sensor configured to detect accelerations on a plurality of detection axes, a module control unit configured to control the acceleration sensor, and a module storage unit configured to store state information of the acceleration sensor.

Embodiments of an electrical outlet of the present invention generally include one or more sockets which include, in addition to positive, negative, and optionally, grounding electrical connections, at least one coupling/communication component, wherein AC electrical current flows through the outlet only when a plug comprising a complementary coupling/communication component is engaged with the socket, whereby the proximity of the coupling/communication component and the complementary coupling/communication component actuates the outlet to provide electrical current therethrough. In one embodiment, in lieu of a complementary coupling/communication component, a wireless transmission device is used to send a signal to the coupling/communication component to actuate the outlet. In other embodiments, an electrical outlet of the present invention includes a mechanism for maintaining engagement between the outlet and a receptacle/plug that provides for safe disengagement when they are inadvertently separated. Embodiments of a method of using embodiments of apparatuses of the present invention are also provided.

Embodiments of an electrical outlet of the present invention generally include one or more sockets which include, in addition to positive, negative, and optionally, grounding electrical connections, at least one coupling/communication component, wherein AC electrical current flows through the outlet only when a plug comprising a complementary coupling/communication component is engaged with the socket, whereby the proximity of the coupling/communication component and the complementary coupling/communication component actuates the outlet to provide electrical current therethrough. In one embodiment, in lieu of a complementary coupling/communication component, a wireless transmission device is used to send a signal to the coupling/communication component to actuate the outlet. In other embodiments, an electrical outlet of the present invention includes a mechanism for maintaining engagement between the outlet and a receptacle/plug that provides for safe disengagement when they are inadvertently separated. Embodiments of a method of using embodiments of apparatuses of the present invention are also provided.