The disclosure relates to an auxiliary module for an electrical switching device including an input, an output, a first housing and a switching module which is configured to switch between a first configuration in which the switching module allows a current to flow between the input and the output and a second configuration in which the switching module blocks the current, the first housing defining a chamber which accommodates the switching module and defining a space for receiving the auxiliary module, the space containing a signalling member configured to transmit information relating to a state of the electrical switching device to the auxiliary module when the auxiliary module is in the space. This auxiliary module comprises a controller configured to generate a message and a radiofrequency communication module configured to transmit the message, via a radiofrequency data link, to a remote device.

A circuit breaker can include a light source, an optical sensor, a handle and a processor. The handle can be movable between different handle positions which correspond to different circuit breaker statuses. The handle can include a handle body and a light control plate which moves along with the handle body. The light control plate can have different light passage regions each of which is configured to be positioned between the light source and the optical sensor when the handle is moved to a corresponding one of the different handle positions. Each of the different light passage regions allows a different amount of light emitted from the light source to pass to the sensor when positioned between the light source and the sensor. The processor is configured to determine a status of the circuit breaker based on the sensed amount of light which relates to a position of the handle.

In one embodiment, there is a fault interrupter device comprising at least one sensor comprising at least one first transformer having at least one outer region forming an outer periphery and at least one inner hollow region. There is also at least one second transformer that is disposed in the inner hollow region of the at least one first transformer. The transformers can be substantially circular in configuration, and more particularly, ring shaped. In another embodiment there is a rotatable latch which is used to selectively connect and disconnect a set of separable contacts to selectively disconnect power from the line side to the load side. The rotatable latch is in one embodiment coupled to a reset button. In at least one embodiment there is a slider which is configured to selectively prevent the manual tripping of the device.

In one embodiment, there is a fault interrupter device comprising at least one sensor comprising at least one first transformer having at least one outer region forming an outer periphery and at least one inner hollow region. There is also at least one second transformer that is disposed in the inner hollow region of the at least one first transformer. The transformers can be substantially circular in configuration, and more particularly, ring shaped. In another embodiment there is a rotatable latch which is used to selectively connect and disconnect a set of separable contacts to selectively disconnect power from the line side to the load side. The rotatable latch is in one embodiment coupled to a reset button. In at least one embodiment there is a slider which is configured to selectively prevent the manual tripping of the device.

According to one aspect, embodiments herein provide a circuit breaker sensor for use in a panelboard including a plurality of circuit breakers, the circuit breaker sensor comprising a housing having a top portion and a bottom portion, a magnet coupled to the bottom portion and configured to magnetically couple the circuit breaker sensor to a surface of the panelboard, an accelerometer coupled to the magnet and configured to sample movement of the surface via the magnet; and a controller coupled to the accelerometer and configured to identify, based on the samples taken by the accelerometer, whether one of the plurality of circuit breakers in the panelboard has tripped.

According to one aspect, embodiments herein provide a circuit breaker sensor for use in a panelboard including a plurality of circuit breakers, the circuit breaker sensor comprising a housing having a top portion and a bottom portion, a magnet coupled to the bottom portion and configured to magnetically couple the circuit breaker sensor to a surface of the panelboard, an accelerometer coupled to the magnet and configured to sample movement of the surface via the magnet; and a controller coupled to the accelerometer and configured to identify, based on the samples taken by the accelerometer, whether one of the plurality of circuit breakers in the panelboard has tripped.

A circuit breaker and a power distribution system are provided. The circuit breaker includes a housing and an internal element disposed inside the housing. The housing includes a front panel and a rear panel that are disposed opposite to each other, the front panel is disposed with a button, a status display unit, and a power wiring port, and the rear panel is disposed with a power interface and a signal interface. The power wiring port and the power interface are connected to a circuit of a power distribution system. The signal interface is internally and electrically connected to the button, the status display unit, and the internal element, and the signal interface is externally configured to be electrically connected to a control unit disposed outside the housing. A control signal of the control unit implements working of the button, the status display unit, and the internal element.

An improved multi-pole circuit interrupter includes an improved trip deck assembly adjacent one pole and further includes an accessory deck adjacent another pole. The accessory deck includes conventional accessory devices such as an auxiliary switch, etc., and the trip deck assembly includes switches and one or more other devices that can interact with a crossbar and a trip bar of the circuit interrupter. Such switches can be easily installed by a technician in the field after manufacture of the circuit interrupter. One switch is held in place by a support, and the other switch is held in place by a retainer, with the support and the retainer holding the switches in a fixed position on the trip deck assembly in order to interact with the crossbar and the trip bar.

An improved multi-pole circuit interrupter includes an improved trip deck assembly adjacent one pole and further includes an accessory deck adjacent another pole. The accessory deck includes conventional accessory devices such as an auxiliary switch, etc., and the trip deck assembly includes switches and one or more other devices that can interact with a crossbar and a trip bar of the circuit interrupter. Such switches can be easily installed by a technician in the field after manufacture of the circuit interrupter. One switch is held in place by a support, and the other switch is held in place by a retainer, with the support and the retainer holding the switches in a fixed position on the trip deck assembly in order to interact with the crossbar and the trip bar.

An electrical overload protection device for readily identifying and resetting a tripped circuit breaker includes a button, which is retained in depressed and extended configurations by a biaser. A first end and a second end of a plate spring are attached to the housing and the biaser, respectively. A bimetal strip, which is attached to and positioned in the housing, is reversibly deformable and thus bendable upon exposure to a specified current. Depressing the button contacts the biaser with the bimetal strip to complete an electrical circuit, which, should it exceed the specified current, bends the bimetal strip to actuate the plate spring to extend a shaft from the housing. The bending also disengages the biaser from the bimetal strip and breaks the electrical circuit. Depressing the shaft reverses deformation of the bimetal strip and reextends the button so it is again depressible to complete the electrical circuit.