The present disclosure provides a charging receptacle and a charging plug, which cooperate with each other and comprise a receptacle ejection device and a plug ejection device respectively for automatically separating the charging receptacle from the charging plug after charging of the apparatus to be charged is completed. The present disclosure further provides a charging system comprising the charging receptacle and the charging plug as described above.

Provided is a plug for use as a disconnector for current transformers. Two types of short circuits are provided in the plug. A first short circuit is used for diverting overvoltages by short-circuiting the electrical contacts in the plug. A second short circuit is provided for short-circuiting electrical contacts in the plug when the plug is not contacted. The short circuits are designed in such a way that the first short circuit is used as a fuse when the second short circuit fails.

A releasable power assembly prevents damage to plugs and receptacles connected to refrigerated shipping containers (reefers). Reefers are temporarily stored in shipping port reefer scaffolds and then loaded onto or unloaded off of ground transportation or freighters. However, errors in port command and control systems may result in the failure to unplug reefers prior to loading or unloading. Conventional reefer power plugs and receptacles are twist-locked together and damaged or destroyed if not manually disconnected prior to reefer movement. An advantageous releasable power assembly automatically unlatches before reaching a breaking point for failure to disconnect plug and receptacle.

A rack BMS detects a ground fault through a circuit embedded therein, and as a master BMS is configured to disconnect all the connections between battery racks and a grid in the case in which the rack BMS detects the ground fault, no more current flows through chassis, thereby protecting the battery racks and ensuring safety of a person using the battery racks.

An improved electrical power cord adapted to enhance the safety of an artificial lighted tree is presented. The electrical power cord has a three-prong safety grounded plug located at a first distal end of the electrical power cord, the plug electrically coupled to a multi-conductor cable comprising a neutral member, a hot member and a ground member. The electrical power cord also has a circuit protector connected in-line with the multi-conductor cable, the circuit protector including a fuse, or, a circuit breaker, having stationary and movable contacts operable between open and closed positions, and a manually operable reset button operably configured with the circuit breaker and electrically connected between said circuit breaker and the ground member for selectively actuating said circuit breaker for opening said movable contacts.

A releasable power assembly prevents damage to plugs and receptacles connected to refrigerated shipping containers (reefers). Reefers are temporarily stored in shipping port reefer scaffolds and then loaded onto or unloaded off of ground transportation or freighters. However, errors in port command and control systems may result in the failure to unplug reefers prior to loading or unloading. Conventional reefer power plugs and receptacles are twist-locked together and damaged or destroyed if not manually disconnected prior to reefer movement. An advantageous releasable power assembly automatically unlatches before reaching a breaking point for failure to disconnect plug and receptacle.

A leakage current detection and interruption (LCDI) device for power cord, and power connector and appliance employing the same. The LCDI device includes a switch module coupled on the power supply lines to control electrical connection between input and output ends of the device; a leakage current detection module including a leakage current detection line, for detecting a leakage current on the power supply lines and outputting a leakage current fault signal accordingly; a drive module, for driving the switch module to disconnect the electrical connection in response to the leakage current fault signal and/or an open circuit fault signal, the open circuit fault signal representing an open circuit condition of the leakage current detection line; and a test module including a test switch, coupled to the leakage current detection module, where the leakage current detection module outputs the leakage current fault signal when the test switch is closed.

A service plug includes a body portion including a pair of power bus bars that are connected to a power supply circuit by being connected to a first terminal of a connector, a switching lever portion including an interlock terminal that brings the power supply circuit into a closed state when being in a state of conduction with a second terminal of the connector, and brings the power supply circuit into an open state when being in a state of non-conduction with the second terminal of the connector, and a power interruption portion that brings the interlock terminal 32 of the switching lever portion into a state of non-conduction with the second terminal to bring the power supply circuit into an open state by using an actuator that is operated in accordance with a collision detection signal for a vehicle.

A power cord disconnect apparatus and methods of disconnecting a power cord. An ejection mechanism may include a scotch yoke assembly, the scotch yoke being reciprocatable to engage and eject a power cord plug out of a receptacle. The apparatus may include a power circuit with a normally-open first switch closing in response to the plug being inserted into the receptacle and a normally-closed second switch opening in response to a signal, power being transferred between the power cord and the power circuit when the first switch and second switch are closed, power being prevented if either the first or second switch opens.

A leakage current detection and interruption (LCDI) device for power cord, and power connector and appliance employing the same. The LCDI device includes a switch module coupled on the power supply lines to control electrical connection between input and output ends of the device; a leakage current detection module including a leakage current detection line, for detecting a leakage current on the power supply lines and outputting a leakage current fault signal accordingly; a drive module, for driving the switch module to disconnect the electrical connection in response to the leakage current fault signal and/or an open circuit fault signal, the open circuit fault signal representing an open circuit condition of the leakage current detection line; and a test module including a test switch, coupled to the leakage current detection module, where the leakage current detection module outputs the leakage current fault signal when the test switch is closed.