A plug comprises power contacts and a trip jumper having jumper contacts configured to make a trip connection, during a plugging action with the plug and a receptacle, with mating trip contacts in the receptacle. When the receptacle is connected to electrical power during the plugging action, a current over the trip connection can cause disconnection of a receptacle power contact from the power. A receptacle comprises receptacle power contacts and a trip circuit having receptacle trip contacts configured to make a trip connection, during a plugging action with the receptacle and plug, with mating trip contacts in the plug. When the receptacle is connected to electrical power during the plugging action, a current over the trip connection can cause disconnection of power to a receptacle power contact. A system can have an electrical device with a line cord connected to the plug.

A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism and control circuitry are provided to move the switchable contact to an open position in response to a predetermined electrical condition.

A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism and control circuitry are provided to move the switchable contact to an open position in response to a predetermined electrical condition.

A locking device includes: a housing intended to be mounted on an electrical switchboard between a first switching apparatus and a second switching apparatus, each of the switching apparatuses having a control lever able to move between a lower position, corresponding to an open state, and an upper position, corresponding to a closed state, a locking member able to move in rotation between: a first locking position, in which the locking member blocks the control lever of the first switching apparatus in the open position, and a second locking position, in which the locking member blocks the control lever of the second switching apparatus in the open position.

A self-resetting current limiter includes: a first connecting contact for bringing the current limiter into contact with a first electrical conductor a second connecting contact for bringing the current limiter into contact with a second electrical conductor; a first movable contact member; and a second movable contact member, wherein the first and the second movable contact members are electrically interconnected in a first position of the first and the second movable contact member, such that a current path between the first and the second connecting contact is closed, and wherein the first and the second movable contact members are separated from one another in a second position of the first and the second movable contact member, such that the current path between the first and the second connecting contact is interrupted.

A plug comprises power contacts and a trip jumper having jumper contacts configured to make a trip connection, during a plugging action with the plug and a receptacle, with mating trip contacts in the receptacle. When the receptacle is connected to electrical power during the plugging action, a current over the trip connection can cause disconnection of a receptacle power contact from the power. A receptacle comprises receptacle power contacts and a trip circuit having receptacle trip contacts configured to make a trip connection, during a plugging action with the receptacle and plug, with mating trip contacts in the plug. When the receptacle is connected to electrical power during the plugging action, a current over the trip connection can cause disconnection of power to a receptacle power contact. A system can have an electrical device with a line cord connected to the plug.

A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism and control circuitry are provided to move the switchable contact to an open position in response to a predetermined electrical condition.

In this method, the voltage outage load-side is an opening of the circuit breaker, and the circuit breaker is able to interrupt the flow of electric current in an electric connection including an electric conductor. The auxiliary unit comprises a current sensor for measuring the intensity of the current flowing in the electric conductor and a first detection means for detecting the voltage outage load-side from the circuit breaker. The method comprises the following steps: measuring the intensity of the current flowing in the electric conductor, detecting the voltage outage load-side from the electric circuit breaker, determining a cause of the detected voltage outage load-side from the circuit breaker, said cause being selected from the group consisting in: an electric overload, a short-circuit and a voltage drop.

A self-resetting current limiter includes: a first connecting contact for bringing the current limiter into contact with a first electrical conductor a second connecting contact for bringing the current limiter into contact with a second electrical conductor; a first movable contact member; and a second movable contact member, wherein the first and the second movable contact members are electrically interconnected in a first position of the first and the second movable contact member, such that a current path between the first and the second connecting contact is closed, and wherein the first and the second movable contact members are separated from one another in a second position of the first and the second movable contact member, such that the current path between the first and the second connecting contact is interrupted.

A plug comprises power contacts and a trip jumper having jumper contacts configured to make a trip connection, during a plugging action with the plug and a receptacle, with mating trip contacts in the receptacle. When the receptacle is connected to electrical power during the plugging action, a current over the trip connection can cause disconnection of a receptacle power contact from the power. A receptacle comprises receptacle power contacts and a trip circuit having receptacle trip contacts configured to make a trip connection, during a plugging action with the receptacle and plug, with mating trip contacts in the plug. When the receptacle is connected to electrical power during the plugging action, a current over the trip connection can cause disconnection of power to a receptacle power contact. A system can have an electrical device with a line cord connected to the plug.