A reset mechanism includes: a reset button, electromagnet, and reset mounting bracket, where a rotary lifting block is movably on the bracket; lifting parts are separately at two sides of one end of the block, and a clamping hook is the other end; a lifting block spring is on one side of the lifting part of the block; a position-limiting block matched with the block is on the bracket, which has a slide rocker in a movable manner; a rocker bending part is at a tail of the slide rocker; an end part of the rocker bending part has a rocker bayonet; an iron core of the electromagnet has an iron core card slot matched with the bayonet, which is clamped to the iron core card slot; and a bottom of the reset button has a reset lever matched with one side of the clamping hook of the block.

A residual current circuit breaker has a summation current transformer that has primary windings as well as a secondary and a tertiary winding, the secondary winding forming a circuit with an electronic trigger unit that is independent of the network voltage, and the tertiary winding forming a circuit with an electronic trigger unit that is dependent on the network voltage. The residual current circuit breaker may have an electronic control unit designed to actuate a switch upon predefinable actuation by the network voltage-dependent electronic trigger unit, and the switch, when in the actuated state, may interrupt contact of the secondary winding with the network voltage-independent electronic trigger unit and establishes contact of the tertiary winding with the network voltage-dependent electronic trigger unit.

A switching device includes multiple switches configured to selectively connect one of two power sources to electrical loads. The switching device may include either single-pole or double-pole, double-throw switches and corresponding single or double circuit breakers. The single and double circuit breakers are each configured to be inserted into openings having the same physical dimensions. At least one of the switches is a double-pole, double-throw switch, allowing two branch circuits to be transferred between power sources via the switch. A double breaker corresponding to the double-pole, double-throw transfer switch permits each of the branch circuits being switched by the double-throw switch to be wired through a separate protective circuit.

A switching device includes multiple switches configured to selectively connect one of two power sources to electrical loads. The switching device may include either single-pole or double-pole, double-throw switches and corresponding single or double circuit breakers. The single and double circuit breakers are each configured to be inserted into openings having the same physical dimensions. At least one of the switches is a double-pole, double-throw switch, allowing two branch circuits to be transferred between power sources via the switch. A double breaker corresponding to the double-pole, double-throw transfer switch permits each of the branch circuits being switched by the double-throw switch to be wired through a separate protective circuit.

A storage battery monitoring device includes a pair of measurement lines connected respectively to a pair of voltage detection lines connected respectively to a positive and a negative electrode of a rechargeable battery, a pair of adjustment lines connected respectively to the pair of voltage detection lines in parallel with the measurement lines, a first capacitive element connected between the pair of measurement lines, a second capacitive element connected between the pair of adjustment lines, and a switch connected across the second capacitive element. Capacitance values of the first and second capacitive elements are set such that a voltage between the pair of measurement lines continues changing after closing the switch and then opening the switch after a lapse of a predetermined short-circuit time if the voltage detection line is broken.

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.

A power controller includes an input power terminal, an output power terminal, a power switching circuit connected between the input power terminal and the output power terminal, a detection circuit connected to the power switching circuit, one or more data interfaces, and a control device connected to the detection circuit and the one or more data interfaces. The detection circuit measures a load current and a current squared time (I.sup.2t) value between the input power terminal and the output power terminal. The control device automatically turns the power switching circuit OFF whenever the load current exceeds a first value or the current squared time value exceeds a second value or an OFF signal is received from the one or more data interfaces, and automatically turns the power switching circuit ON whenever an ON signal is received from the one or more data interfaces.

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.