Abstract: A leakage current detection and interruption device includes a switch module for connecting and disconnecting an electrical connection between input and output ends of current carrying lines; a leakage current detection module coupled to the current carrying lines, for detecting a leakage current signal on the current carrying lines and generating a detected signal in response thereto; a leakage current processing module coupled to the leakage current detection module, for receiving the detected signal and generating a leakage fault signal based on the amplitude and frequency of the detected signal; and a drive module coupled to the switch module and the leakage current processing module, for receiving the leakage fault signal and driving the switch module to disconnect the electrical connection in response thereto.

Abstract: A leakage detection and interruption device includes a switch module to control power connection between input and output terminals of a power line; a leakage detection module to generates a leakage fault signal when the leakage current on the power line exceeds a threshold; a power module, including a first current limiting element, coupled in series between the power line and the leakage detection module, to supply power to the leakage detection module; the driving module includes a electromagnetic coil and a switching semiconductor device, to drive the switching module to disconnect the power connection in response to a leakage fault signal. The first end of the first current limiting element is coupled to the power line, and the second end is coupled to the first end of the switching semiconductor device through at least one first diode and/or second current limiting element.

Abstract: A leakage current detection and interruption device includes a switch module for connecting and disconnecting input and output ends of current carrying lines; a leakage current detection module for detecting a leakage current signal on the current carrying lines and generating a leakage fault signal in response thereto; an over-temperature protection module for detecting a temperature of a predefined location and/or component of the device and generating an over-temperature fault signal when the detected temperature exceeds a predetermined temperature threshold; a drive module for driving the switch module to disconnect the electrical connection in response to the leakage fault signal and/or over-temperature fault signal; and a self-test module for periodically generating a simulated leakage current signal to detect a malfunction in the leakage current detection module and/or drive module, and generating a self-test fault signal when detecting the malfunction.

Abstract: A leakage protection device with additional functions. The device includes a housing, an input terminal for coupling to a power supply, an output terminal for coupling to an electrical load, and a core assembly disposed in the housing. The core assembly includes a leakage protection assembly, including at least a leakage protection circuit board for detecting a leakage current signal at the output terminal; an additional function assembly, coupled to the leakage protection assembly and including at least an additional function circuit board for performing at least one load end function. The leakage protection circuit board and the additional function circuit board are stacked in parallel with each other, and the leakage protection circuit board is locater farther away from the input terminal than the additional function circuit board is. The device integrates the additional function assembly in the leakage protection device and optimizes the structural layout.

Abstract: A leakage detection protection device includes: a switch module; a leakage detection module including first and second leakage detection lines connected in series at one end, for generating a leakage fault signal when a leakage current signal is detected; a monitoring module for detecting whether the first and/or second leakage detection line has a fault, and for generating a detection fault signal when a fault is detected; a drive module for driving the switch module to disconnect power connection in response to the leakage fault signal and/or the detection fault signal; and a functional redundancy module, including at least one redundant element, connected in series or in parallel with at least one element in the monitoring module and/or the drive module, for providing the same function as the at least one element when it has a fault. This device can provide a redundant function when some elements are damaged.

Abstract: A load control device for regulating an electrical load includes: a support component including a connection portion; a knob frame including a gripping portion and an elastic portion, the gripping portion at least partially surrounding the support component and configured to drive the knob frame to rotate in response to a rotational force acting thereon, the elastic portion configured to move toward the connecting portion in response to the knob frame moving in a first direction, thereby undergoing elastic deformation; a display assembly disposed on a side surface of the knob frame facing away from the support component; a circuit board component disposed adjacent the display assembly; a switch component disposed on the circuit board component, for controlling the load in response to triggering and releasing the triggering; a switch trigger component for applying the triggering and releasing the triggering to the switch trigger component; and an adjustment component for adjusting the load in response to the r

Abstract: A method for determining malfunction in a liquid drainage pump includes: obtaining a liquid discharge condition during operation of the liquid drainage pump in a first mode, the liquid discharge condition including one or more of a time variation trend of liquid in a liquid storage tank of the liquid drainage pump, start and stop times of the liquid drainage pump, a liquid discharge volume per unit time, and a liquid discharge speed of the liquid drainage pump; determining whether a liquid discharge abnormality occurred based on the liquid discharge condition; and determining that the liquid drainage pump has a malfunction when a statistical number of liquid discharge abnormalities in a continuous time period exceeds a first threshold. The method can quickly determine whether a liquid drainage pump has a liquid discharge malfunction such as a blockage or component damage, and reduce time and effort of manual troubleshooting.

Abstract: A load control device for regulating an electrical load includes: a support component including a connection portion; a knob frame including a gripping portion and an elastic portion, the gripping portion at least partially surrounding the support component and configured to drive the knob frame to rotate in response to a rotational force acting thereon, the elastic portion configured to move toward the connecting portion in response to the knob frame moving in a first direction, thereby undergoing elastic deformation; a first circuit board component; a switch trigger component; a switch component coupled to the first circuit board component, for controlling the load in response to triggering and releasing the triggering from the switch trigger component; and an adjustment component coupled to the first circuit board component, for adjusting the load in response to the rotation of the knob frame. The load control device simultaneously realizes rotation and pressing functions of the knob frame.

Abstract: A core unit for a leakage current detection and interruption device includes a control circuit board; a drive coil assembly coupled to the circuit board, including a coil holder frame and an input or output assembly connected thereto; and a magnetic movement assembly nested with the drive coil assembly, including a magnetic movement frame and the output or input assembly connected thereto. In response to relative movements between the drive coil assembly and the magnetic movement assembly away from or toward each other, the input and output assemblies are disconnected from or connected to each other, respectively. The core unit achieves reset function and trip function by the coordination of the drive coil assembly and magnetic movement assembly, effectively ensuring power connection and disconnection while reducing the number of components. This design reduces the size of the device and reduces assembly cost.

Abstract: A leakage current protection device includes a first housing, an input assembly, an output assembly, a second housing detachably affixed to the first housing by a connecting assembly to form a holding chamber with the first housing, a leakage current protection module disposed in the holding chamber and coupled with the input and output assemblies, where the leakage current protection module includes a switch mechanism between the input and output assemblies and circuit components to detect leakage current signals and to drive the switch to disconnect the electrical connection between the input and output assemblies when detecting a leakage current signal. A cover plate is affixed to the first and/or second housing and covers the connecting assembly. The leakage current protection device is resistant to disassembly by the user and resulting performance degradation, and further improves the safety and convenience during use.

Abstract: A leakage current detection and interruption device includes a switch module configured to control electrical connection between input and output ends of power supply lines; a leakage current detection module configured to generate a leakage fault signal in response to a leakage current in the power supply lines; a leakage-responsive drive module configured to drive the switch module to disconnect the electrical connection in response to the leakage fault signal; a fault-responsive drive module configured to drive the switch module to disconnect the electrical connection in response to a fault in the leakage-responsive drive module; and a self-test module configured to generate a self-test signal and to generate a self-test fault signal in response to a fault in the leakage current detection module and/or the leakage-responsive drive module. By providing the fault-responsive drive module, the device can automatically disconnect the electrical power when the leakage-responsive drive module has a fault.

Abstract: A leakage current detection and interruption device includes a switch module for controlling electrical connection of power supply lines between input and output ends; a leakage current detection module, including first and second leakage current detection lines respectively covering the first and second power supply lines, to detect leakage current thereon and to generate respective first and second leakage signals in response thereto; a signal processing module, coupled to the leakage current detection module to receive the first and/or second leakage signals and to generate a leakage fault signal in response thereto; and a trigger module, coupled to the switch module and the signal processing module, to receive the leakage fault signal and in response thereto, to drive the switch module to disconnect the electrical connection to the output end. The device can detect current leaks on the two power supply lines and is simple, low-cost and reliable.

Abstract: A leakage current detection and interruption (LCDI) device includes a leakage current detection module, including a first and a second leakage current detection line and at least one resistive element and/or at least one semiconductor element, configured to detect a leakage current signal on the first or second current-carrying line and to generate a leakage fault signal in response to detecting the leakage current signal. The first and second leakage current detection lines are electrically insulated from each other, and respectively cover one of the first and second current-carrying lines. The at least one resistive element and/or semiconductor element is coupled in series between the first and second leakage current detection lines to form a current path for detecting an open circuit fault in the leakage current detection module. By detecting the fault in the first and second leakage current detection lines, the reliability of the LCDI device is improved.

Abstract: A ground fault circuit interrupter (GFCI) device includes a ground fault detection module for detecting a ground fault in a neutral line of a plurality of current carrying lines and generating a ground fault signal in response thereto, including a neutral line detection coil having a magnetic core made of a silicon steel and through which the current carrying lines pass; a leakage current detection module for detecting the ground fault signal and detecting a leakage current signal on the current carrying lines, and generating a zero sequence current fault signal in response to either signal; and a drive module for receiving the zero sequence current fault signal and driving a switch module to disconnect the electrical connection of the current carrying lines in response thereto. The GFCI device can avoid false tripping when high frequency currents flow through the current carrying lines, improving user experience and enhancing safety.

Abstract: A ground fault circuit interrupter includes a circuit breaker for connecting and disconnecting an electrical connection between an input end and an output end of a plurality of power supply lines, a shunt module coupled to the circuit breaker and for driving the circuit breaker to disconnect the electrical connection; a ground fault detection device coupled to the shunt module and having a detector coil opening on its exterior housing configured to accommodate the power supply lines to passing through, for detecting a ground fault signal on the output end of the power supply lines and outputting a control signal to the shunt module in response thereto, wherein the shunt module drives the circuit breaker to disconnect the electrical connection in response to the control signal. The ground fault circuit interrupter includes fastening devices that join the ground fault detection device and the circuit breaker to each other.

Abstract: A ground fault circuit interrupter (GFCI) device includes a ground fault detection module for detecting a ground fault in a neutral line of a plurality of current carrying lines and generating a ground fault signal in response thereto, including a neutral line detection coil having a magnetic core made of a silicon steel and through which the current carrying lines pass; a leakage current detection module for detecting the ground fault signal and detecting a leakage current signal on the current carrying lines, and generating a zero sequence current fault signal in response to either signal; and a drive module for receiving the zero sequence current fault signal and driving a switch module to disconnect the electrical connection of the current carrying lines in response thereto. The GFCI device can avoid false tripping when high frequency currents flow through the current carrying lines, improving user experience and enhancing safety.

Abstract: A leakage current detection and interruption device includes a switch module for connecting and disconnecting input and output ends of current carrying lines; a leakage current detection module for detecting a leakage current signal on the current carrying lines and generating a leakage fault signal in response thereto; an over-temperature protection module for detecting a temperature of a predefined location and/or component of the device and generating an over-temperature fault signal when the detected temperature exceeds a predetermined temperature threshold; a drive module for driving the switch module to disconnect the electrical connection in response to the leakage fault signal and/or over-temperature fault signal; and a self-test module for periodically generating a simulated leakage current signal to detect a malfunction in the leakage current detection module and/or drive module, and generating a self-test fault signal when detecting the malfunction.

Abstract: A protection structure for waterproof protection of an electrical device, including first and second shells connected to each other forming an outer shell, the first and second shells respectively including first and second reinforcement walls on their inside, and a sealing member disposed between the first and second reinforcement walls to form a waterproof seal between them. The protection structure employs a dual-layer structure, where the outer shell is a first protection layer that protects against high impact, high pressure water flow, and the sealing member with the first and second reinforcement walls form a second protection layer which is tightly waterproof to protect against water droplets, vapor and dust. The first protection layer protects the second protection layer from external impact and prevent it from being deformed, enhancing the overall protection effectiveness. The protection structure is easy to manufacture, low cost and easy to repair, and provide high waterproofness.

Abstract: A power cord includes at least two power supply lines, at least two insulation layers respectively covering the power supply lines, first and second shield layers respectively disposed around corresponding insulating layers to detect leakage currents on the corresponding power supply lines, at least one shield insulating layer disposed between the first and second shield layers to electrically insulate them from each other, a first and a second signal conductor disposed either between the first (or second) shield layer and the corresponding insulation layer or outside the first (or second) shield layer. Each signal conductors is formed of at least one conductor wire and at least one filament in a twisted or woven structure and configured to conduct the leakage current. The signal conductors have great tensile strength which solves the problem of breaking of the signal conductors.

Abstract: A safety shield assembly for a power receptacle includes a frame having openings corresponding to socket holes of the power receptacle, and a sliding block assembly and a resilient member disposed in the frame. The sliding block assembly include a sliding block body with two inclined surfaces, at least one of which having a slot to receive a wear-resistant block. In the initial state, the resilient member urges the sliding block assembly to cover the openings. The frame further includes a position limiting member and a balancing support member. When an inserted object pushes on only one of the two inclined surfaces, the position limiting member limits a sliding motion of the sliding block assembly; when two inserted objects simultaneously push on the two inclined surfaces, the sliding block assembly is balanced on the balancing support member and slides along the frame to expose the openings.