A connector includes two connection terminals to be electrically connected to terminals of another connector, and a switch connected to the connection terminals. The switch includes a first switch connected to one of the connection terminals, the first switch including a first fixed part including a fixed contact, and a first movable part including a movable contact that is contactable by the fixed contact, and a second switch connected to another of the connection terminals, the second switch including a second fixed part including a fixed contact, and a second movable part including a movable contact that is contactable by the fixed contact. The first fixed part and the second fixed part, or the first movable part and the second movable part include multiple contacts.

An electrical connector includes a housing having contact channels with electrical contacts received therein each having a poke-in spring beam configured to engage an electrical wire when poked-in to the housing. The electrical contact is movable between a resting position when no wire is present in the wire channel and a clearance position where the electrical contact allows the electrical wire to be removed from the wire channel. Pivot levers are held by the housing and are coupled to corresponding electrical contacts with a pivot end pivotably coupled to the housing and a push button end having a push button pressed to move the corresponding electrical contact to the clearance position. When the electrical wire is loaded into the wire channel, the electrical contact is positioned in a pinching position in which the spring beam pinches against the electrical wire in physical contact with the electrical wire.

An electrical connector includes a housing having contact channels with electrical contacts received therein each having a poke-in spring beam configured to engage an electrical wire when poked-in to the housing. The electrical contact is movable between a resting position when no wire is present in the wire channel and a clearance position where the electrical contact allows the electrical wire to be removed from the wire channel. Pivot levers are held by the housing and are coupled to corresponding electrical contacts with a pivot end pivotably coupled to the housing and a push button end having a push button pressed to move the corresponding electrical contact to the clearance position. When the electrical wire is loaded into the wire channel, the electrical contact is positioned in a pinching position in which the spring beam pinches against the electrical wire in physical contact with the electrical wire.

A connector assembly is disclosed including a first connector and a second connector matable with the first connector. The first connector has a first housing, a first power terminal attached, and a first signal terminal. The second connector has a lever attached to a moving housing, the lever moving the moving housing between a mating released position, an intermediate position, and a mating completed position, a second housing movably disposed within the moving housing, a second power terminal disposed in the second housing and contacting the first power terminal in the intermediate position, a second signal terminal attached to the moving housing and contacting the first signal terminal at a position between the intermediate position and the mating completed position, and a separating protrusion disposed on the moving housing preventing the second power terminal from contacting the first power terminal in the mating released position.

A high-safety electrical plug includes a plug body, a rotation element, and at least one plug pin. The rotation element is rotatably arranged on the plug body, and the at least one plug pin is arranged on the rotation element. The rotation element includes an elastic element and a rotation body standing with the elastic element. The rotation body includes two axial cylinders opposite each other and a position limiting element. The two cylinders are formed on the rotation body. The position limiting element defines more than two side surfaces. One side surface connects with the elastic element, deforming the elastic element. The rotation body is rotated until the side surface previously connected with the elastic element is replaced by another side surface to connect with the elastic element, which fixes the rotation body on the elastic element after the rotation.

A safety socket includes one or multiple socket bodies. A socket body has a live wire receptacle and a neutral wire receptacle, and includes a live wire connection circuit, a neutral wire connection circuit, and a locking and controlling mechanism. When the live wire pin and the neutral wire pin of a power plug are respectively inserted into the live wire receptacle and the neutral wire receptacle of the socket body, the locking and controlling mechanism is activated and is switched to the operating state so as to connect the live wire connection circuit and the neutral wire connection circuit. When the locking and controlling mechanism is in the idle state, the live wire connection circuit and the neutral wire connection circuit are disconnected. The safety socket can effectively prevent electric shock and is water-proof, thereby preventing electric shock accidents and ensuring the safe usage of the safety socket.

A safety socket includes one or multiple socket bodies. A socket body has a live wire receptacle and a neutral wire receptacle, and includes a live wire connection circuit, a neutral wire connection circuit, and a locking and controlling mechanism. When the live wire pin and the neutral wire pin of a power plug are respectively inserted into the live wire receptacle and the neutral wire receptacle of the socket body, the locking and controlling mechanism is activated and is switched to the operating state so as to connect the live wire connection circuit and the neutral wire connection circuit. When the locking and controlling mechanism is in the idle state, the live wire connection circuit and the neutral wire connection circuit are disconnected. The safety socket can effectively prevent electric shock and is water-proof, thereby preventing electric shock accidents and ensuring the safe usage of the safety socket.

A method of using an umbilical between a surface location and an underwater location of an underwater fluid extraction well system is provided. The umbilical includes an electrical power conductor configured to transmit electrical power at a first frequency from a source at the surface location to the underwater location. The method comprises detecting that the umbilical has been compromised by the ingress of water. In response thereto, the method comprises converting electrical power from the source to electrical power at a second frequency, wherein the second frequency is lower than the first frequency or DC electrical power; transmitting the electrical power at the second frequency or DC electrical power to the underwater location via the conductor; and converting, at the underwater location, the electrical power at the second frequency or DC electrical power to electrical power at a frequency used by the underwater equipment of the well system.

A method of using an umbilical between a surface location and an underwater location of an underwater fluid extraction well system is provided. The umbilical includes an electrical power conductor configured to transmit electrical power at a first frequency from a source at the surface location to the underwater location. The method comprises detecting that the umbilical has been compromised by the ingress of water. In response thereto, the method comprises converting electrical power from the source to electrical power at a second frequency, wherein the second frequency is lower than the first frequency or DC electrical power; transmitting the electrical power at the second frequency or DC electrical power to the underwater location via the conductor; and converting, at the underwater location, the electrical power at the second frequency or DC electrical power to electrical power at a frequency used by the underwater equipment of the well system.

A connector assembly is disclosed including a first connector and a second connector matable with the first connector. The first connector has a first housing, a first power terminal attached, and a first signal terminal. The second connector has a lever attached to a moving housing, the lever moving the moving housing between a mating released position, an intermediate position, and a mating completed position, a second housing movably disposed within the moving housing, a second power terminal disposed in the second housing and contacting the first power terminal in the intermediate position, a second signal terminal attached to the moving housing and contacting the first signal terminal at a position between the intermediate position and the mating completed position, and a separating protrusion disposed on the moving housing preventing the second power terminal from contacting the first power terminal in the mating released position.