A device with a combined unbalanced current sensor and solenoid coil is provided. The device includes a core (116). The core (116) comprises a ferromagnetic material. The core (116) substantially surrounds a first conductor (102) and a second conductor (104) that conduct power to and from a load (106). The device includes a coil (118) that is wrapped around at least a portion of the core (116), such that an unbalanced current between the first and second conductors (102, 104) creates a first magnetic field that induces a first voltage on the coil (118). The coil (118) is positioned adjacent to a mechanical action part (124), such that application of a second voltage to the coil (118) creates a second magnetic field that influences the mechanical action part (124) to move from a first position to a second position that electrically disconnects the load (106) from a power source, such that the coil (118) serves as both an unbalanced current sensor coil and a solenoid coil.

A device with a combined unbalanced current sensor and solenoid coil is provided. The device includes a core (116). The core (116) comprises a ferromagnetic material. The core (116) substantially surrounds a first conductor (102) and a second conductor (104) that conduct power to and from a load (106). The device includes a coil (118) that is wrapped around at least a portion of the core (116), such that an unbalanced current between the first and second conductors (102, 104) creates a first magnetic field that induces a first voltage on the coil (118). The coil (118) is positioned adjacent to a mechanical action part (124), such that application of a second voltage to the coil (118) creates a second magnetic field that influences the mechanical action part (124) to move from a first position to a second position that electrically disconnects the load (106) from a power source, such that the coil (118) serves as both an unbalanced current sensor coil and a solenoid coil.

A ground fault circuit interrupter (GFCI) can include a current transformer (CT) comprising a single core, a first winding wound around the single core, and a second winding wound around the single core. The GFCI can include a ground fault (GF) detection module operatively connected to the first winding to receive signals from the first winding and configured to determine whether a line-to-ground fault exists. The GFCI can also include a GN stimulus operatively connected to the second winding to provide a GN stimulus signal to the second winding. The GFCI can also include a grounded neutral (GN) detection module operatively connected to second winding and configured to receive signals from the second winding to determine whether a neutral-to-ground fault exists.

A ground fault circuit interrupter (GFCI) can include a current transformer (CT) comprising a single core, a first winding wound around the single core, and a second winding wound around the single core. The GFCI can include a ground fault (GF) detection module operatively connected to the first winding to receive signals from the first winding and configured to determine whether a line-to-ground fault exists. The GFCI can also include a GN stimulus operatively connected to the second winding to provide a GN stimulus signal to the second winding. The GFCI can also include a grounded neutral (GN) detection module operatively connected to second winding and configured to receive signals from the second winding to determine whether a neutral-to-ground fault exists.

A current measurement device including current sensors positioned around current conductors in order to form a passage for the current conductors along an axis oriented in a first direction and a differential current sensor positioned around the set of current conductors in order to form a common passage for the current conductors along an axis oriented in a second direction. The current sensors and the differential current sensor are located in spaces that are separated by an interface plane. A method for manufacturing such a current measurement device, to a protection module and a differential circuit breaker including such a device.

A power cable assembly includes a power cable extending between a first end and a second end having a hot conductor and a neutral conductor. The power cable assembly includes a circuit protection device along the power cable between the first and second ends. The circuit protection device has a ground fault circuit interrupt (GFCI) device configured to sense a current difference on the hot and neutral conductors to initiate a triggering event. The circuit protection device has a high-power relay device connected to the GFCI device. The high-power relay device is connected to the hot conductor and is configured to open the hot line when the triggering event is initiated by the GFCI device.

A GFCI includes a latch assembly provided with a rigid electrically conducting bar connected thereto such that when a user presses a reset button the latch assembly is moved toward a pair of contacts provided as part of a reset circuit to initiate a reset operation. When the electrically conducting bar on the latch assembly connects the pair of contacts, the reset circuit is closed and an actuator is activated to place the GFCI device in the latched, reset, condition. If the GFCI device is correctly wired, the latch assembly enters the latched state. If the device is not properly wired no power is provided to the actuator and the device remains in the tripped, or open, state.

An electrical protection device, including a switching mechanism configured to switch between a set configuration and a tripped configuration, and a slide movable between a set position and a disengaged position. The electrical protection device further includes a resetting hook kinematically linked to a switching lever, and the slide supports a slide hook. When the slide is in the disengaged position, the resetting hook and the slide hook are ready to be engaged, and when the slide is in the set position, the slide hook and the resetting hook are spaced apart from each other and resetting of the electrical protection device results in engagement of the slide hook and the resetting hook and in a displacement of the slide.

A differential electrical protection device D including N-1 phase conductors, each phase conductor including, between an input, or upper, connection land and an output, or lower, connection land, a portion able to pass through a torus and a portion able to pass through a current measurement and supply sensor, the input connection lands being situated in a first plane P1, and the output connection lands extending in a second plane P2, in that the supply and measurement sensors of the N1 phase conductors are each positioned in the space situated between the two planes P1,P2, and wherein it includes an additional phase conductor including an input connection land and an output connection land, a portion able to pass through the torus and a portion able to pass through an additional measurement sensor only measuring the current, this additional measurement sensor being of small size and being positioned directly above the torus in such a way that the assembly formed by the torus and the additional sensor is situated substantially in the space between the two planes P1,P2.

Aspects of an electrical safety device that provides detection of miswiring of line and load connection pairs are presented. In an example, the device includes a differential current detector through which are routed a live current path and a neutral current path coupling the line and load connection pairs. The device also includes a selectable conducting path that, when selected, circumvents the differential current detector while coupling one of a line live connection to a load live connection or a line neutral connection to a load neutral connection of the connection pairs. The device further includes a control circuit that determines, via the differential current detector, while the conducting path is selected, a differential current defined by a difference in currents on the live and neutral current paths, and interrupts at least one of the live and neutral current paths in response to the differential current not exceeding a threshold value.