A vehicular electrical plug or connector is provided. In another aspect, an electrical connector includes a wire cable having a first end that is permanently connected to a wheeled recreational vehicle, a second end with an outlet-engageable plug thereon, and a switch allowing for a high potential or dielectric withstand test by the vehicle manufacturer in one switch condition, and then the switch allowing for normal use while detecting and/or alerting a user of an electrical ground and/or polarity problem in another switch condition. A further aspect of an electrical connector employs multiple lights on a plug, one of which alerts a user of an electrical ground and/or polarity problem, and another of which is illuminated when electricity is flowing through the plug. Another aspect of a vehicular electrical plug and method of manufacturing same, includes liquid polyurethane fed into a hole in a plug housing which then fills the otherwise open area therein to create a water-resistant seal for the plug.

An arc prevention system including a jack having a receptacle, a modular connector sized to be positioned in the receptacle of the jack, the modular connector including a plurality of contacts, with at least two of the contacts creating an energized electrical path with an external power source in electrical communication with the external power source, a latch extending from a top surface of the modular connector, a switching unit positioned on the latch, a plug unit positioned between the latch and the jack that prevents the modular connector from moving out of the receptacle, a control circuit in electrical communication with switch and the at least two energized contacts, where the electrical path between the control circuit and the switching unit is energized when the plug engages the switching unit on the latch, and the control circuit adjusts the energized electrical path to a predetermined electrical level.

An arc prevention system including a jack having a receptacle, a modular connector sized to be positioned in the receptacle of the jack, the modular connector including a plurality of contacts, with at least two of the contacts creating an energized electrical path with an external power source in electrical communication with the external power source, a latch extending from a top surface of the modular connector, a switching unit positioned on the latch, a plug unit positioned between the latch and the jack that prevents the modular connector from moving out of the receptacle, a control circuit in electrical communication with switch and the at least two energized contacts, where the electrical path between the control circuit and the switching unit is energized when the plug engages the switching unit on the latch, and the control circuit adjusts the energized electrical path to a predetermined electrical level.

Current leakage interrupter, having a shell consisting of an upper shell and a lower shell, a PCB inside the shell, a detection device and a trip device mounted to the PCB, power lines electrically connected to the trip device through the detection device, and pins electrically connected to the trip device. The lower shell has pin holes; front ends of the pins extend out of the pin holes. A reverse hook is provided at an inner side of the lower shell at an edge of each pin hole to fix onto a first side of a rear end of a corresponding pin; a second side of the rear end of each pin is extended and bended into a bended portion; a supporting seat is also provided at the inner side of the lower shell at the edge of each pin hole to support the bended portion of the corresponding pin.

Current leakage interrupter, having a shell consisting of an upper shell and a lower shell, a PCB inside the shell, a detection device and a trip device mounted to the PCB, power lines electrically connected to the trip device through the detection device, and pins electrically connected to the trip device. The lower shell has pin holes; front ends of the pins extend out of the pin holes. A reverse hook is provided at an inner side of the lower shell at an edge of each pin hole to fix onto a first side of a rear end of a corresponding pin; a second side of the rear end of each pin is extended and bended into a bended portion; a supporting seat is also provided at the inner side of the lower shell at the edge of each pin hole to support the bended portion of the corresponding pin.

This application discloses a protection circuit for preventing a misconnection at an input end and a photovoltaic power generation system, and relates to the field of power electronics technologies. The protection circuit includes an input end, a misconnection detection unit, a mechanical interlocking unit, and a switch unit. The input end is configured to connect to an output end of a direct current power supply. A first input end of the misconnection detection unit is connected to a first port of the input end, and a second input end of the misconnection detection unit is connected to a second port of the input end. An output end of the misconnection detection unit is coupled to the mechanical interlocking unit. The mechanical interlocking unit is connected to the switch unit. A first end of the switch unit is configured to connect to the input end, and a second end of the switch unit is configured to connect to a next circuit. The misconnection detection unit is configured to: when connection wires of the first port and the second port are incorrect, control the mechanical interlocking unit to keep the first end of the switch unit and the second end of the switch unit in a disconnected state. When positive and negative poles of a power supply connected to the input end are misconnected, the protection circuit can be used to prevent a circuit from being affected by the misconnection.

This application discloses a protection circuit for preventing a misconnection at an input end and a photovoltaic power generation system, and relates to the field of power electronics technologies. The protection circuit includes an input end, a misconnection detection unit, a mechanical interlocking unit, and a switch unit. The input end is configured to connect to an output end of a direct current power supply. A first input end of the misconnection detection unit is connected to a first port of the input end, and a second input end of the misconnection detection unit is connected to a second port of the input end. An output end of the misconnection detection unit is coupled to the mechanical interlocking unit. The mechanical interlocking unit is connected to the switch unit. A first end of the switch unit is configured to connect to the input end, and a second end of the switch unit is configured to connect to a next circuit. The misconnection detection unit is configured to: when connection wires of the first port and the second port are incorrect, control the mechanical interlocking unit to keep the first end of the switch unit and the second end of the switch unit in a disconnected state. When positive and negative poles of a power supply connected to the input end are misconnected, the protection circuit can be used to prevent a circuit from being affected by the misconnection.

A thermal protection plug, provides a temperature sensor I, which is directly contact with the neutral wire terminal, so as the heat transferring from neutral wire terminal to the temperature sensor keeps prompt and improve the response delay to cut-off the power switch. And because the negative pole of DC is collinear with the neutral wire terminal, it means that the temperature sensor I can use a low voltage isolation sensor and it is safer even though the breakdown between the shell and the pins of the temperature sensor I.

A temperature-sensitive battery connector is disclosed. The connector can include a connector body and at least one conductor mounted to the connector body and configured to convey a current signal used to measure voltage from a battery pack or battery cell to a battery management system (BMS). The connector can include a thermal switching device mounted to the connector body and thermally coupled to a terminal of a battery pack or a battery cell. The thermal switching device can be configured to provide an overtemperature signal to the BMS by changing or interrupting a current conducted by at least one conductor when a temperature of the battery pack or battery cell exceeds a threshold temperature.

Embodiments of the present invention provide a power supply module and a soft start method. The power supply module includes an input detection circuit configured to output a first notification signal to a trigger drive circuit when it is determined that the power supply module receives a power supply signal; the trigger drive circuit configured to, upon receipt of the first notification signal sent from the input detection circuit, wait for a predetermined duration without sending a drive signal to a current limiting circuit, and to send the driver signal to the current limiting circuit when the predetermined duration elapses; and the current limiting circuit configured to limit a current on a Direct Current (DC) bus of the power supply module when the drive signal is not received by the current limiting circuit, and not to limit the current on the DC bus upon receipt of the drive signal.