The current transformer includes a magnetic circuit made of magnetic material that is intended to be placed around a primary conductor, and a secondary winding that is wound onto a portion of the magnetic circuit in order to deliver a secondary current to processing circuits. In this current transformer the magnetic circuit includes at least one device for varying the magnetization of a portion of the magnetic circuit according to the temperature in order to limit or to decrease the magnetic flux in the magnetic circuit when the temperature of the magnetic circuit increases. The protection device and the electrical circuit breaker include such a transformer.

Embodiments of the present disclosure disclose a method for improving a performance of a pulsed-ultraviolet (PUV) device. The method includes monitoring an input current across a circuit breaker in communication with a UV lamp, where the input current is delivered by a power signal and is interrupted by the circuit breaker upon exceeding a predefined cut-off current; generating a pulse signal having a set of frequencies based on the power signal for driving the UV lamp, where the pulse signal is associated with a predetermined cut-off frequency that increases the input current beyond the cut-off current; determining a predefined threshold current less than the cut-off current; and configuring the pulse signal with multiple distinct pulse frequencies per second for a predefined configuration period based on the input current exceeding the threshold current. The distinct pulse frequencies per second include at least one pulse frequency greater than the cut-off frequency.

An adjustable trip assembly is for an electrical switching apparatus. The electrical switching apparatus includes a housing, separable contacts and an operating mechanism for opening and closing the separable contacts. The adjustable trip assembly includes a load conductor, a magnetic assembly comprising a magnetic member and an armature movably coupled to the magnetic member, and a calibration assembly comprising a calibration bracket cooperating with the armature, and an adjustment mechanism being adjustable to move the calibration bracket and thereby adjust the position of the armature with respect to the magnetic member to calibrate the magnetic assembly. The magnetic assembly further includes a biasing element that biases the armature away from the magnetic member.

A system and method for changing protection settings groups for relays in a micro-grid between a grid-connected settings group and an islanded settings group. The method changes a power source relay from the grid-connected settings group to the islanded settings group before the micro-grid is disconnected from the utility grid, disconnects the micro-grid from the utility grid, and then changes a load relay from the grid-connected settings group to the islanded settings group after the micro-grid is disconnected from the utility grid. The method also changes the load relay from the islanded settings group to the grid-connected settings group before the micro-grid is connected to the utility grid, connects the micro-grid to the utility grid, and then changes the power source relay from the islanded settings group to the grid-connected settings group after the micro-grid is connected to the utility grid.

A system and method for changing protection settings groups for relays in a micro-grid between a grid-connected settings group and an islanded settings group. The method changes a power source relay from the grid-connected settings group to the islanded settings group before the micro-grid is disconnected from the utility grid, disconnects the micro-grid from the utility grid, and then changes a load relay from the grid-connected settings group to the islanded settings group after the micro-grid is disconnected from the utility grid. The method also changes the load relay from the islanded settings group to the grid-connected settings group before the micro-grid is connected to the utility grid, connects the micro-grid to the utility grid, and then changes the power source relay from the islanded settings group to the grid-connected settings group after the micro-grid is connected to the utility grid.

The present invention relates to an isolation mechanism of a controller for a direct current circuit breaker, which has a simple structure for isolation and connection manipulation. The isolation mechanism of a controller for a circuit breaker comprises a first connector that has a plurality of output terminals electrically connected to the controller and a plurality of input terminals detached from the output terminals for connecting an input electric power source; and a second connector that has a first connection position connected to the first connector and a second connection position rotated at 180 from the first connection position and connected to the first connector, and has a conductor wiring portion electrically connecting the output terminals with the input terminals at the first connection position and electrically disconnecting the output terminals from the input terminals at the second connection position.

An electromagnetic trip unit, wherein: the electromagnetic trip unit includes a movable core, an upper static core and a lower static core; the movable core can move relative to the upper static core and the lower static core in the upper static core and the lower static core; a movable core body end of a movable core body of the movable core faces and approaches the lower static core end of the lower static core, when the electromagnetic trip unit is not released, a first magnetic field air gap is formed between the movable core body end and the lower static core end; the movable core body of the movable core is also provided with a movable core body step, when the electromagnetic trip unit is not released, a second magnetic field air gap is formed between the movable core body step and the lower static core end.

A safety switching device for controlling a load having at least one input for receiving an input signal and one output for outputting an output signal, and having an electrical circuit which provides the output signal as a function of the input signal. The electrical circuit is arranged on a printed circuit board and is coupled to at least one setting component for setting an operating parameter of the safety switching device. The surface of the printed circuit board defines a mounting plane, and the at least one setting component has an adjusting element in a housing and is arranged recessed on the printed circuit board so that the housing of the adjusting element intersects the mounting plane.

A programmable pushbutton breaker switch having a pushbutton, a plurality of amperage indicating light emitting diodes (LEDs), a plurality of breaker circuits, and a plurality of LED light pipes in an interior of the pushbutton. Each of the LEDs is associated with a specific breaker circuit and with a specific light pipe. Light from a specific LED passes through a specific LED light pipe and produces an indicator light on the top of the pushbutton. The indicator light identifies an amperage amount, shown on the top of the pushbutton, of a specific breaker circuit. A programming switch inside the programmable pushbutton breaker switch allows the operation of the pushbutton to select a desired breaker amperage amount from a plurality of breaker amperage amounts shown on the top of the pushbutton and to set and store the desired amperage amounts in the programmable pushbutton breaker switch.

A programmable pushbutton breaker switch having a pushbutton, a plurality of amperage indicating light emitting diodes (LEDs), a plurality of breaker circuits, and a plurality of LED light pipes in an interior of the pushbutton. Each of the LEDs is associated with a specific breaker circuit and with a specific light pipe. Light from a specific LED passes through a specific LED light pipe and produces an indicator light on the top of the pushbutton. The indicator light identifies an amperage amount, shown on the top of the pushbutton, of a specific breaker circuit. A programming switch inside the programmable pushbutton breaker switch allows the operation of the pushbutton to select a desired breaker amperage amount from a plurality of breaker amperage amounts shown on the top of the pushbutton and to set and store the desired amperage amounts in the programmable pushbutton breaker switch.