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. The device has a simple structure, is low cost and safe.

IPC Classes  ?

• H02H 1/00 - Details of emergency protective circuit arrangements
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02H 3/05 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with means for increasing reliability, e.g. redundancy arrangements
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature

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.

IPC Classes  ?

• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current

Abstract

A leakage current detection and interruption device includes a switch module; a leakage current detection module for detecting leakage current signal on current carrying lines and generating a leakage fault signal in response thereto; a drive module, coupled to the switch module and the leakage current detection module, for driving the switch module to disconnect electrical connection on the current carrying lines in response to the leakage fault signal; a self-test module, coupled to the leakage current detection module and the drive module, for periodically generating a simulated leakage current signal and detecting malfunction in the leakage current detection module and/or drive module, and generating a self-test fault signal in response thereto; and an alarm module, coupled to the self-test module, for generating an alarm signal in response to the leakage fault signal and/or self-test fault signal. The device can alert the user under tripped or malfunction conditions.

IPC Classes  ?

• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• G08B 7/06 - Signalling systems according to more than one of groups Personal calling systems according to more than one of groups using electric transmission
• G08B 29/18 - Prevention or correction of operating errors
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 3/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned

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.

IPC Classes  ?

• G01R 31/327 - Testing of circuit interrupters, switches or circuit-breakers
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02H 1/04 - Arrangements for preventing response to transient abnormal conditions, e.g. to lightning

Abstract

An electrical fault detection and interruption device includes a switch module coupled between input and output ends of current carrying lines, for controlling an electrical connection between the two ends; a signal collection module, for detecting a fault signal on the current carrying lines and converting it to an electrical signal; a signal processing module, for determining whether a fault is present on the current carrying lines based on the electrical signal, and generating an electrical fault signal accordingly; a drive module, for driving the switch module to disconnect the electrical connection between the input and output ends in response to receiving the electrical fault signal; and an alarm module, for generating an alarm signal in response to receive the electrical fault signal. Thus, even when the device malfunctions and loses its protection function, it can still generate an alarm signal to alert the user.

IPC Classes  ?

• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• G01R 31/327 - Testing of circuit interrupters, switches or circuit-breakers
• H02H 1/00 - Details of emergency protective circuit arrangements

Abstract

An electrical fault detection and interruption device includes a switch module coupled between input and output ends of current carrying lines, a GFCI (ground fault circuit interrupter) fault detection module for generating a ground fault signal when detecting a leakage current on the current carrying lines, an AFCI (arc fault circuit interrupter) fault detection module for generating an arc fault signal when detecting harmful arcs on the current carrying lines, a drive module for driving the switch module to disconnect the electrical connection between the input and output ends in response to the ground fault signal and/or arc fault signal, a fault signal transfer module for generate a simulated leakage current signal in response to the arc fault signal, and a monitoring module for generating a harmful arc signal to test whether the electrical fault detection and interruption device is functioning normally.

IPC Classes  ?

• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• G08B 21/18 - Status alarms

Abstract

An arc fault detection circuit includes a signal collection circuit that collects a current signal on power supply lines and to output a first signal; a window gating circuit that generates a window gating signal corresponding to the first signal; and a signal processing circuit, coupled to the signal collection circuit and the window gating circuit, for generating an arc fault signal based on the window gating signal and the first signal. By using the window gating circuit, the arc fault detection circuit performs arc detection only during certain time intervals of the AC period where the harmful arcs will be present. This improves the accuracy of arc detection and reduces the probability of false tripping.

IPC Classes  ?

• G01R 31/08 - Locating faults in cables, transmission lines, or networks

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.

IPC Classes  ?

• H01B 9/00 - Power cables
• H02H 7/22 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systemsEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for switching devices
• H05K 9/00 - Screening of apparatus or components against electric or magnetic fields

Abstract

A cable management device adapted to be installed in an installation hole of a building unit to pass a cable. The device includes a base frame assembly, adapted to be installed to the building unit around the installation hole, the base frame assembly defining an opening adapted to be aligned with the installation hole; and an inner support frame assembly, affixed to the base frame assembly, including a flexible diaphragm adapted for passing the cable, the flexible diaphragm covering the opening of the base frame assembly. The cable management device can reduce the amount of exposed cables, making it more convenient to clean and organize the cables and improving aesthetics.

IPC Classes  ?

• F16L 5/02 - Sealing
• H02G 3/08 - Distribution boxesConnection or junction boxes
• H02G 3/22 - Installations of cables or lines through walls, floors or ceilings, e.g. into buildings

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.

IPC Classes  ?

• H01R 13/453 - Shutter or cover plate opened by engagement of counterpart

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.

IPC Classes  ?

• H01R 13/52 - Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
• H01R 25/00 - Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits

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.

IPC Classes  ?

• H01H 51/01 - Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
• H01H 50/02 - BasesCasingsCovers
• H01H 50/18 - Movable parts of magnetic circuits, e.g. armature
• H01H 50/44 - Magnetic coils or windings
• H01H 51/06 - Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity

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.

IPC Classes  ?

• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H01H 47/00 - Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
• H01H 47/32 - Energising current supplied by semiconductor device
• H01H 71/24 - Electromagnetic mechanisms
• H02H 3/05 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with means for increasing reliability, e.g. redundancy arrangements
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01R 13/713 - Structural association with built-in electrical component with built-in switch the switch being a safety switch

Abstract

An indicator light, an electrical converter plug, a positioning bracket, and an electrical converter plug assembly. The indicator light for indicating a working status of the electrical device includes a light guide rod having opposite first and second ends, and a light shade, disposed at the first end of the light guide rod and including multiple indicating surfaces facing different directions. When the indicator light is installed on the electrical device, the second end of the light guide rod faces a light source inside the electrical device, and light from the light source is guided by the light guide rod to the light shade and emitted in the multiple directions by the light shade, allowing the user to observe the light from multiple angles. Further, a positioning bracket affixes the electrical converter plug to the power outlet socket, ensuring secure contact, prolonging product life, and eliminating safety threat.

IPC Classes  ?

• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• H01R 13/502 - BasesCases composed of different pieces
• H01R 13/621 - Bolt, set screw or screw clamp
• H01R 31/06 - Intermediate parts for linking two coupling parts, e.g. adapter

Abstract

A leakage current detection and interruption (LCDI) device includes a switch module to control electrical connection of first and second 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 currents thereon, a detection monitoring module coupled to the leakage current detection module and the first and second power supply lines to generate an open circuit detection signal in response to an open circuit condition in the first or second leakage current detection line, and a test module including a normally closed test switch coupled to the first or second leakage current detection line, wherein when the test switch is manually operated to open, the switch module disconnects the first and second power supply lines between the input and output ends.

IPC Classes  ?

• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass

Abstract

A leakage current detection and interruption device for power cord includes a switch module, a leakage current detection module, an open circuit detection module, and a trigger module. The switch module controls the electrical connection between input and output ends of the power cord. The leakage current detection module has two leakage current detection lines to collect leakage current on the power supply lines of the power cord. The open circuit detection module is coupled to the leakage current detection module, and generates an open-circuit fault signal when an open circuit exists in at least one of the two leakage current detection lines. The trigger module is coupled to the switch module and the open circuit detection module, and receives a leakage fault signal and/or the open-circuit fault signal, and in response thereto, drives the switch module to disconnect the electrical connection between the input and output ends.

IPC Classes  ?

• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults

Abstract

A power receptacle for supplying power to a plug inserted therein includes a shell, which includes a cover assembly having at least one socket on its exterior adapted to receive the plug, and a base cooperating with and coupled to the cover assembly; an electrical connection assembly, disposed within the shell, and configured to electrically connect to the plug which is inserted into the socket; a PCB (printed circuit board) assembly, disposed within the shell, including a power processing circuit, and electrically coupled to the electrical connection assembly; and a grounding frame, formed of metal, and partially disposed between the electrical connection assembly and the PCB assembly. The structure improves heat dissipation from interior components of the receptacle and its electromagnetic compatibility.

IPC Classes  ?

• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details
• H05K 5/03 - Covers

Abstract

A power plug includes a shell, input insertion plates, output power lines, a push button on the shell, and a trip assembly inside the shell for controlling electrical coupling between the input insertion plates and output power lines. The trip assembly includes a light emitting element, electrical coupling terminals, and a drive member mechanically coupled to the push button and configured to, in response to a pressing of the push button, control electrical coupling of the electrical coupling terminals, which in turn controls the electrical coupling between the input insertion plates and output power lines. The drive member includes a reflective portion that reflects a part of the light from the light emitting element to the push button as an indicator light. The dual function drive member that accomplishes both mechanical coupling and light transmission reduces the number of components. A device with an electrical control circuit is also disclosed.

IPC Classes  ?

• H01R 13/71 - Contact members of coupling parts operating as switch
• H01R 13/713 - Structural association with built-in electrical component with built-in switch the switch being a safety switch
• H01R 13/717 - Structural association with built-in electrical component with built-in light source

Abstract

A leakage current protection device (such as a power plug) for an electrical appliance includes a shell and a trip assembly inside the shell. The shell includes an upper cover and a base cover joined together, and either the upper cover or the base cover includes a first cover and a removable second cover. The removable second cover spatially corresponds to a tail portion of the trip assembly; when it is removed, the tail portion is exposed to allow a power cord to be connected to the leakage current protection device. By using a removable second cover, the cord can be conveniently assembled with the device when the device is installed on the electrical appliance, allowing the to be shipped without the cord. This can reduce the packed size of the device for easier shipping and storage, as well as lowering cost. It also makes the device more versatile.

IPC Classes  ?

• H01R 13/66 - Structural association with built-in electrical component
• H01R 24/28 - Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass

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.

IPC Classes  ?

• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 7/00 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions

Goods & Services

Canvas for tapestry; Woollen blankets

Abstract

A leakage current detection and interruption device for a power cord includes a switch module that controls an electrical connection of first and second power supply lines because input and output ends; a leakage current detection module, including first and second leakage current detection lines, which respectively detect leakage current signals on the first and second power supply lines and generate self-test fault signals in response to the first and second leakage current detection lines having an open circuit; and a drive module including at least one solenoid, a first semiconductor device forming a first current path from the first to the second power supply line when conductive, and a second semiconductor device forming a second current path from the second to the first power supply line when conductive, to supply current to the solenoid which in turn drives the switch module to disconnect the electrical connection.

IPC Classes  ?

• H02H 3/32 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02H 1/00 - Details of emergency protective circuit arrangements

Abstract

A power cord with leakage current detection and interruption (LCDI) function includes at least two power supply lines, at least two insulating layers respectively covering the at lease two power supply lines, at least two leakage current detection lines respectively disposed around the at least two insulating layers, including a first leakage current detection line and a second leakage current detection line, at least one connector line, electrically coupled to the first leakage current detection line and/or the second leakage current detection line, and at least one insulating structure, covering at least one of the at least two leakage current detection lines, to electrically insulate the first and second leakage current detection lines from each other.

IPC Classes  ?

• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• H01H 83/02 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 7/22 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systemsEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for switching devices

Abstract

A leakage current detection and interruption device coupled to power supply lines, including a leakage current detection module for generating a leakage current fault signal when detecting leakage currents on the lines; a trip drive module responsive to the leakage current fault signal to drive a switch to disconnect power on the lines, the trip drive module including a first semiconductor device responsive to the leakage current fault signal to cause a current in a first coil to drive the switch; a coil function detection module for generating a coil fault signal when detecting a fault in the first coil; a self-test module for generating a self-test fault signal when detecting a fault in the leakage current detection module or the first semiconductor device; and a detection drive module for driving the switch to disconnect power in response to the coil fault signal or the self-test fault signal.

IPC Classes  ?

• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• H02H 1/00 - Details of emergency protective circuit arrangements

Abstract

A switching device includes a first enclosure containing a switch, a rod-shaped second enclosure having a second end connected to the first enclosure, a detector unit in the second enclosure, and a float disposed around the second enclosure and capable of moving along it. As the float moves from the first end of the second enclosure toward the second end, when the float enters a first position range, a first position sensor senses the float and transmits a first sensing signal to a detection circuit; when the float enters a second position range, a second position sensor senses the float and transmits a second sensing signal to the detection circuit. The detection circuit close a switch in response to the second sensing signal to turn on an external appliance. The switching device is flexible, reliable, and inexpensive to produce.

IPC Classes  ?

• H01H 35/18 - Switches operated by change of liquid level or of liquid density, e.g. float switch
• G01F 23/36 - Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using electrically actuated indicating means
• G01F 23/44 - Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using electrically actuated indicating means

Abstract

A power plug with LCDI includes a shell, multiple input insertion prongs partially exposed to an exterior of the shell, a movement assembly disposed in the shell and coupled to the multiple input insertion prongs, a male end assembly and a female end assembly both disposed in the shell, and multiple output conductors. A first end of the male end assembly is connected to the movement assembly and electrically coupled to the multiple input insertion prongs via the movement assembly; a second end of the male end assembly is inserted into a first end of the female end assembly; a second end of the female end assembly is electrically coupled to the multiple output conductors; and the movement assembly is configured to establish or cut off an electrical connection between the multiple input insertion prongs and the multiple output conductors. This power plug improves efficiency of assembly.

IPC Classes  ?

• H01R 13/70 - Structural association with built-in electrical component with built-in switch
• H01R 13/713 - Structural association with built-in electrical component with built-in switch the switch being a safety switch
• H01R 24/30 - Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable with additional earth or shield contacts
• H01R 103/00 - Two poles

Abstract

An LCDI device includes a shell, a movement unit, and a wire bundle assembly. The shell includes a base and an upper cover connected to each other. The movement unit is disposed in the base, and includes at least one connecting conductor. A first end of the wire bundle assembly is disposed in the upper cover and includes at least one shield detection line, where the shield detection line is electrically coupled to the connecting conductor. The shield detection line includes a connecting terminal at the first end of the wire bundle assembly which is configured to received and retain the connecting conductor inserted therein. The structure of the LCDI enables fast and secure assembling of the wire bundle assembly and movement unit, and eliminates the need for internal re-adjustment of the shield detection lines after assembling, which promotes automation of large scale production.

IPC Classes  ?

• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass

Abstract

A leakage current detection and interruption (LCDI) device for a power cord includes a switch module that controls an electrical connection of first and second power supply lines between input and an output ends; a leakage current detection module, including first and second leakage current detection lines, which respectively cover the first and second power supply lines, and are respectively configured to detect leakage current signals on the first and second power supply lines and to generate self-test fault signals in response to the first and second leakage current detection lines having an open circuit; and a drive module which receives the first and/or second leakage current signal and the first and/or second self-test fault signal, and drives the switch module to disconnect the electrical connection in response to these signals. The LCDI device can individually detect leaks on the two power supply lines and open circuit on the two leakage current detection lines.

IPC Classes  ?

• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 7/22 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systemsEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for switching devices
• H01H 83/02 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents

Abstract

A power supply adapter includes a base plate, an electrical connector assembly disposed on the base plate, a support frame, a circuit board, and a shell body. The electrical connector assembly includes a hot connector assembly, a neutral connector assembly, and a ground connector assembly. When the adapter is plugged into a two-prong socket, the ground connector assembly is grounded to the two-prong socket. The support frame covers the electrical connector assembly and is affixed to the base plate. The circuit board is disposed on the support frame and electrically coupled to the electrical connector assembly. The shell body covers the support frame and circuit board and is affixed to the base plate. The power supply adapter can used with two-prong sockets that lack a ground slot, and provides grounding test function after being plugged into the two-prong socket, making it safe and convenient to use.

IPC Classes  ?

• H01R 13/66 - Structural association with built-in electrical component
• H01R 31/06 - Intermediate parts for linking two coupling parts, e.g. adapter
• H01R 13/652 - Protective earth or shield arrangements on coupling devices with earth pin, blade or socket
• H01R 27/00 - Coupling parts adapted for co-operation with two or more dissimilar counterparts
• H01R 103/00 - Two poles

Abstract

A leakage current protection device with an illumination function, including a shell, a movement assembly in the shell, power input and output assemblies coupled to the movement assembly, and an illumination assembly disposed inside the shell, which includes: an illumination control board electrically coupled to the power input or output assembly; a sensing unit coupled to the illumination control board and configured to sense an ambient condition outside the shell to generate a sensing output signal; a light emitting unit coupled to the control board, and controlled by the control board to turn on or off in response to the sensing output signal; and a light guide unit, formed by an operating element partially protruding out of the shell and disposed adjacent the light emitting unit, configured to guide the illumination light emitted by the light emitting unit out of the shell. The device is convenient to use and compact.

IPC Classes  ?

• H01R 13/717 - Structural association with built-in electrical component with built-in light source
• H01R 13/66 - Structural association with built-in electrical component

Abstract

The present invention provides a power receptacle with protective functions, which includes a base assembly, a grounding assembly coupled to the base assembly, a first faceplate coupled to a top of the base assembly, and a cover assembly. The first faceplate includes at least one USB (Universal Serial Bus) interface slot electrically coupled to the base assembly. The cover assembly is removably coupled to the first faceplate and configured to cover the USB interface slot. The power receptacle can prevent dust and other objects from entering the slots, thereby ensuring the safety of the receptacle and prolong its life.

IPC Classes  ?

• H01R 13/447 - Shutter or cover plate
• H01R 13/52 - Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
• H02G 3/14 - Fastening of cover or lid to box
• H01R 27/02 - Coupling parts adapted for co-operation with two or more dissimilar counterparts for simultaneous co-operation with two or more counterparts

Abstract

A power receptacle includes an upper cover, a middle cover, and a base assembly. The middle cover includes an interface group, the interface group including at least one first-type interface, and at least one second-type interface and/or at least one third-type interface. The upper cover includes a matching interface group, the matching interface group including matching interfaces that match at least some of the corresponding interfaces of the interface group. The upper cover and the middle cover are removably attached to each other. Because the base assembly does not need to be changed while the upper cover may be changed based on the user's need, the power receptacle has enhanced applicability, saves cost and can meet user's different needs. Because the upper cover can be changed by the user without requiring a skilled worker, the power receptacle is easy to use.

IPC Classes  ?

• H01R 13/506 - BasesCases composed of different pieces assembled by snap action of the parts
• H01R 27/02 - Coupling parts adapted for co-operation with two or more dissimilar counterparts for simultaneous co-operation with two or more counterparts
• H01R 13/717 - Structural association with built-in electrical component with built-in light source

Abstract

A cutting system for a grinding pump, including a cutting disc attached to the pump near an inlet and having a cutting surface with multiple cutting orifices, and a rotating cutter attached to the rotating shaft of the pump and having two cutting blades, each blade having a cutting edge on a forward-facing side of the rotating cutter. The rotating cutter is located on the upstream side of the cutting disc, and cooperates with the cutting orifices of the cutting disc to perform cutting actions. Each cutting orifice has a hole extending from the cutting surface through the cutting disc to form a feeding orifice, and a cutting protrusion protruding from the cutting surface and surrounding the hole region. The multiple cutting orifices define recessed areas of the cutting surface between the cutting orifices. The cutting system can prevent uncut floating matters from being trapped, and is effective and safe.

IPC Classes  ?

• F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
• B02C 18/18 - KnivesMountings thereof
• B02C 18/10 - Disintegrating by knives or other cutting or tearing members which chop material into fragmentsMincing machines or similar apparatus using worms or the like with rotating knives within vertical containers with drive arranged above container

Abstract

A water resistant box includes a front cover, a base for accommodating a power outlet receptacle, and a cable passage cover. The base is coupled to the front cover. The cable passage cover is pivotally coupled to the base, configured to pivot to an open position when the water resistant box is in use and pivot to a closed position when the water resistant box is not in use. The water resistant box can protect power outlets against water when used ins outdoor or wet conditions. It also makes the box easier to use and solves the problem of parts being misplaced.

IPC Classes  ?

• H02G 3/08 - Distribution boxesConnection or junction boxes
• H02G 3/14 - Fastening of cover or lid to box

Abstract

A sealing device, sealing assembly and an apparatus having a rotation shaft that uses the sealing assembly. The sealing assembly includes a rotating shaft seal and a sealing device. The rotating shaft seal has a ring shaped body with the rotating shaft passing through it and a sealing portion forming a dynamic sealing cooperation with the rotating shaft. The sealing device includes a ring shaped body with the rotating shaft passing through it, and includes first and second ring shaped portions spaced apart from each other in an axial direction. The first ring shaped portion defines a static sealing surface forming a static sealing cooperation with the rotating shaft, and the second ring shaped portion defines a dynamic sealing surface forming a dynamic sealing cooperation with a portion of the rotating shaft seal adjacent to the sealing portion of the rotating shaft seal.

IPC Classes  ?

• F16J 15/32 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
• F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member

Abstract

A faceplate for use with a GFCI (ground fault circuit interrupter) device, where the faceplate includes resilient features such as snaps to affix the faceplate to a height extension shell. The height extension shell accommodates a part of the GFCI device. The faceplate has an opening that exposes at least a part of the GFCI device. By using resilient snaps to affix the faceplate, instead of using screws as in conventional GFCI assemblies, this GFCI assembly makes installation more convenient, saves installation time, and makes the faceplate easier to clean and maintain. It also enhances esthetic without sacrificing function.

IPC Classes  ?

• H02G 3/14 - Fastening of cover or lid to box
• H02G 3/08 - Distribution boxesConnection or junction boxes

Abstract

A leakage current detection and protection device includes a leakage current detection module for generating a detection feedback signal when detecting a leakage current on the power supply lines, wherein the power supply lines supply a working power to the leakage current detection module during half of the AC power cycles; a self-test module for testing whether the leakage current detection module is faulty based on the detection feedback signal, which includes: a simulated leakage current generating circuit for generating a simulated leakage current signal; a fault signal generating module for generating a self-test fault signal when the leakage current detection module has a fault; and a self-test compensation module for supplying an auxiliary working power to the leakage current detection module so the leakage current detection module is in a working state whenever the simulated leakage current is generated. This prevents misjudgment by the leakage current detection module.

IPC Classes  ?

• H02H 7/00 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
• H02H 7/20 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
• H02H 1/00 - Details of emergency protective circuit arrangements

Abstract

An leakage current detection and protection device includes a leakage current detection module for detecting a leakage current on the power supply lines and generating a detection feedback signal in response thereto, a self-test module for testing whether the leakage current detection module is faulty, and a trip module for disconnecting the power supply lines in response to the self-test fault signal. The self-test module includes a simulated leakage current trigger circuit for generating a simulated leakage current trigger signal, a simulated leakage current generating circuit for generating a simulated leakage current signal in response to the simulated leakage current trigger signal, a trigger signal turn-off module for turning off the simulated leakage current trigger signal in response to the detection feedback signal, and a fault signal generating module for detecting a fault in the leakage current detection module and generating a self-test fault signal in response thereto.

IPC Classes  ?

• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• G01R 31/58 - Testing of lines, cables or conductors
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02H 1/00 - Details of emergency protective circuit arrangements

Abstract

A leakage current protection device with automatic reset after power outage includes a switch, a power supply module, a leakage current detection module, a self-testing module, a drive control module, and a first reset module. The drive control module drives the switch based on a leakage current signal from the leakage current detection module and/or a self-test fault signal from the self-testing module. The first reset module functions to automatically set the leakage current protection device in a connected state when power resumes after an outage. Another leakage current protection device with manual reset after power outage includes similar components above and also a second reset module, which functions to automatically set the leakage current protection device in a disconnected state when power resumes after an outage; the device can then be manually reset using a reset switch. These two devices can suit different needs of different electrical appliances.

IPC Classes  ?

• H02H 3/06 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with automatic reconnection
• H02H 3/10 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current additionally responsive to some other abnormal electrical conditions
• H02H 3/26 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents

Abstract

A leakage current detection and protection device coupled between input and output ends of power lines, and includes first and second switching modules, a leakage current detection module, a self-test module, and first and second drive modules. When the leakage current detection module detects a leakage current on the power lines, the second drive module controls the second switching module to disconnect power to the output end. When the self-test module detects a fault in the leakage current detection module, the first drive module controls the first switching module to disconnect the power to the output ends. The first switching module is coupled between the input end and a point where the leakage current detection module, the self-test module, and the first and second drive modules are coupled, so that these modules are de-powered when the first switching module disconnects the electrical connection to output ends.

IPC Classes  ?

• H01L 27/02 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
• H02H 3/02 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details
• G01R 31/50 - Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

Abstract

A leakage current detection and protection device, and power connector and electrical appliance employing the same. The device includes: a leakage current detection module which detects a leakage current on the power lines to generate a leakage fault signal; a self-test module which periodically generates a simulated leakage current and outputs a self-test fault signal when the leakage current detection module is faulty; a trip module, including a switch coupled between the input and output ends of the power lines, and a first trip coil which drives the switch; a drive module which drives the trip module to disconnect the electrical connection between the input and output ends in response to the leakage fault signal and/or the self-test fault signal; and a trip function detection module which generates a trip coil fault signal in response to detecting an open circuit in the first trip coil to disconnect the electrical connection.

IPC Classes  ?

• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
• H02H 7/20 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
• H02H 1/00 - Details of emergency protective circuit arrangements
• H01R 13/713 - Structural association with built-in electrical component with built-in switch the switch being a safety switch

Abstract

A relay-type leakage current protection device includes a switch circuit, a relay circuit, a leakage current detection circuit, a self-test circuit, and a drive circuit. The switch circuit controls electrical connection between input and output ends of the power supply. The relay circuit is coupled to the input end and controls the open/close state of the switch circuit. The leakage current detection circuit detects a leakage current on the power supply lines. The self-test circuit is coupled to the power supply lines and the leakage current detection circuit, to generate a self-test pulse signal which simulates the leakage current and to detect a fault condition in the leakage current detection circuit. The drive circuit drives the relay circuit in response to receiving a leakage current signal from the leakage current detection circuit or a fault signal from the self-test circuit.

IPC Classes  ?

• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• H02H 3/32 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
• H02H 3/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
• H02H 1/00 - Details of emergency protective circuit arrangements

Abstract

A safety shield assembly for a power receptacle and a power receptacle incorporating the same. The assembly includes a frame, and a sliding block and a resilient member disposed in the frame. The frame has multiple openings corresponding to multiple socket holes of the power receptacle, a position limiting member, and a balancing support member. The sliding block has a sliding block base, two protection ramps disposed in the base and spaced apart, and two metal reinforcement members joined to and formed integrally with the two protection ramps to cover their inclined surfaces. When a power plug is inserted into the socket holes, two prongs of the plug push against the reinforcement members on the protection ramps and the sliding block slides away. When an object is inserted into only one socket hole, the balancing support member and position limiting member cooperate to prevent the sliding block from sliding.

IPC Classes  ?

• H01R 13/44 - Means for preventing access to live contacts
• H01R 13/453 - Shutter or cover plate opened by engagement of counterpart
• H01R 13/52 - Dustproof, splashproof, drip-proof, waterproof, or flameproof cases

Abstract

A safety shield assembly for a power receptacle and a power receptacle incorporating the same. The safety shield assembly includes a frame and a sliding block and a resilient member disposed in the frame. The frame has multiple openings corresponding to multiple socket holes of the power receptacle, a position limiting member configured to abut the sliding block, and a balancing support member. In its initial state, the resilient member urges the sliding block to a closed position to covers the openings. The sliding block has two inclined surfaces. When an inserted object pushes on only one of the two inclined surfaces, the position limiting member limits the sliding motion of the sliding block; when two inserted objects simultaneously push on both inclined surfaces, the sliding block is balanced on the balancing support member and is able to slides along the frame to expose the openings.

IPC Classes  ?

• H01R 13/44 - Means for preventing access to live contacts
• H01R 13/453 - Shutter or cover plate opened by engagement of counterpart
• H01R 25/00 - Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits

Abstract

A power plug with leakage current protection device, which includes a body formed of an upper cover and a base, a core assembly disposed in the body, a cable assembly attached to the body, a plurality of input insertion plates and output moving contact arms which are assembled with the core assembly, and an insertion plate sleeve disposed on the base, where the input insertion plates pass through the insertion plate sleeve to protrude from the base. The insertion plate sleeve is made of an insulating and temperature resistant material. The power plug has a simple overall structure and can be assembled easily and reliably. It can prevent the safety risk caused by high temperature of the input insertion plates without increasing the size of the plug. It also has low cost, and can be suitably employed in various types of power plugs.

IPC Classes  ?

• H01H 83/06 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by current falling below a predetermined value
• H01R 13/533 - Bases or cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
• H01R 13/627 - Snap-action fastening
• H01R 13/629 - Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure
• H01R 11/07 - Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the type of the connecting locations on the individual element or by the type of the connections between the connecting locations and the conductive members the connecting locations being of the same type but different sizes
• H01R 13/713 - Structural association with built-in electrical component with built-in switch the switch being a safety switch
• H01R 24/28 - Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
• H01R 13/512 - BasesCases composed of different pieces assembled by screw or screws

Abstract

A leakage current protection device includes an electrical and mechanical assembly which includes: a circuit board; moving contact plates; an auxiliary switch; a reset shaft, having a hook in its lower portion, a bottom end of the reset shaft being set against one end of a reset spring, another end of the reset spring being set against the base; a disconnect mechanism, having a hook at its upper portion to engage with the hook of the reset shaft in a vertical direction; a trip coil and a trip plunger disposed on a side of the disconnect mechanism, where the disconnect mechanism is driven by the trip plunger to move horizontally. The disconnect mechanism further includes a pushing end that controls the auxiliary switch and lifting levers that control the moving contact plates.

IPC Classes  ?

• H01H 71/10 - Operating or release mechanisms
• H01H 71/02 - HousingsCasingsBasesMountings
• H01H 71/08 - TerminalsConnections
• H01H 71/04 - Means for indicating condition of the switching device

Abstract

A leakage current protection plug includes a body formed by a top cover and a base, a moving assembly disposed in the body, and output wires. The moving assembly includes a control circuit board, and a detector assembly and a trip assembly disposed on the control circuit board, wherein power input insertion plates and power output moving contact arms are assembled with the moving assembly. Each output moving contact arm is formed integrally and fixed to the detector assembly, and the output ends of the output moving contact arms are directly connected to the output conductor wires. The device has a simple overall structure and can be reliably assembled. By using integrally formed output moving contact arms to directly couple the input and output, it improves the accuracy of the leakage current detection parameters, reduces internal transfers and solder points, and reduces the size and cost of the plug.

IPC Classes  ?

• H01R 13/713 - Structural association with built-in electrical component with built-in switch the switch being a safety switch
• H01R 13/66 - Structural association with built-in electrical component
• H02H 1/00 - Details of emergency protective circuit arrangements
• H01R 13/58 - Means for relieving strain on wire connection, e.g. cord grip
• H01R 13/631 - Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure for engagement only
• H01R 13/506 - BasesCases composed of different pieces assembled by snap action of the parts
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• H01H 83/14 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
• H01H 73/44 - Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by push-button, pull-knob, or slide
• H01H 83/04 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• H01H 71/58 - Manual reset mechanisms actuated by push-button, pull-knob, or slide

Abstract

A ground fault circuit interrupter device includes a switch module having a reset switch, a control switch mechanically linked to the reset switch, a ground fault detection module, a self-testing module and a tripping module. The switch module controls the electrical connection between the input and output ends of the device. The ground fault detection module detects a leakage current signal at the output end. The self-testing module is coupled to the ground fault detection module and periodically generates a self-test pulse signal which simulates the leakage current signal. The tripping module is electrically coupled to the ground fault detection module and mechanically coupled to the switch module and the control switch, to control the movement of the switch module and the control switch. The control switch, which opens and closes at the same time as the reset switch, controls the power supply to the self-testing module.

IPC Classes  ?

• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
• G01R 31/50 - Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• H01H 71/12 - Automatic release mechanisms with or without manual release
• H02H 3/10 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current additionally responsive to some other abnormal electrical conditions
• G01R 35/00 - Testing or calibrating of apparatus covered by the other groups of this subclass
• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• H01H 71/04 - Means for indicating condition of the switching device
• H01H 83/04 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
• H01H 83/14 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection

Abstract

A ground fault circuit interrupter device includes a switch module, a ground fault detection module, a self-testing module and a tripping module. The switch module is coupled between the input and output ends to control the electrical connection between the input and output. The ground fault detection module detects whether a leakage current signal exists at the output end. The self-testing module is coupled to the ground fault detection module and periodically generates a self-test pulse signal which simulates the leakage current signal. The tripping module is coupled to the ground fault detection module and the switch module, to control the movement of the switch module. The device includes at least two tripping drive components, which prevents the device from becoming ineffective when the tripping module malfunctions due to long time use or use under high temperatures. This greatly improves safety of the device.

IPC Classes  ?

• H01H 13/06 - Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
• H01H 71/24 - Electromagnetic mechanisms
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• H01H 83/04 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
• H01H 83/14 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
• H02H 3/10 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current additionally responsive to some other abnormal electrical conditions

Abstract

A leakage current detection device includes a switching module coupled between power input and output terminals, for controlling the electrical connection between the input and output terminals; a leakage current detection module, including a switch driving component, configured to control the switching module based on working periods of the switch driving component and based on whether a leakage current signal is detected; and a first self testing module, coupled to the leakage current detection module, for periodically generating a self testing pulse signal as a simulated leakage current signal. The first self testing module includes: a periodic timing circuit and a self testing pulse signal generating circuit coupled to each other, where the periodic timing circuit controls the period of the self testing pulse signal. The device provides enhanced safety protection.

IPC Classes  ?

• G08B 21/00 - Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
• G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
• H02H 3/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 1/06 - Arrangements for supplying operative power

Abstract

A leakage current detection device connected between a power source and a load, which includes a self-testing or leakage current detection selection trigger unit, for selecting a leakage current detection mode or a self-testing mode; a self-testing unit, for periodically generating a simulated leakage current signal in the self-testing mode; and a leakage current detection unit, for detecting a leakage current signal in the leakage current detection mode and detecting the simulated leakage current signal in the self-testing mode. The selection trigger unit further causes the power source to be disconnected from the load when a leakage current signal is detected, and sends a self-testing result to the self-testing unit depending on whether the leakage current detection unit detects the simulated leakage current signal. The self-testing unit displays an indication of the self-testing result.

IPC Classes  ?

• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• H02H 3/02 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details

Abstract

A leakage current detection device coupled to AC power supply wires carrying an AC signal, which includes: a leakage current detection circuit including a leakage current detector, the leakage current detection circuit operating during first half-cycles among positive and negative half-cycles of the AC signal to detect a leakage current of the power supply wires and to disconnect the power supply wires from an output side when a leakage current exceeding a first threshold value is detected; and a self-detecting circuit coupled to the leakage current detection circuit, operating during second half-cycles among the positive and negative half-cycles of the AC signal to test whether the leakage current detection circuit is functioning normally.

IPC Classes  ?

• G01R 35/00 - Testing or calibrating of apparatus covered by the other groups of this subclass
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• G01R 31/42 - AC power supplies

Abstract

A leakage current detection interrupter (LCDI) with self-testing function, which includes: a leakage current detection unit, including multiple current-carrying wires and at least one leakage current detection wire for detecting a leakage current of the current-carrying wires; a phase protection unit, coupled to at least one current-carrying wire on the input side of the multiple current-carrying wires, and coupled to at least one current-carrying wire on the output side of the multiple current-carrying wires via the leakage current detection unit, to form a current loop; wherein the phase protection unit can generate a control signal to disconnect the electrical coupling between the LCDI and the power source. By using a temperature controlled module, the leakage current detection unit and the phase protection unit, an LCDI with self-testing function is achieved. When there is a leakage current in the current-carrying wires, or the current-carrying wire is open, or the temperature of the electrical appliance exceeds a predefined range, or the leakage current detection wire is broken, the LCDI can disconnect its electrical coupling with the power source, ensuring the safety of the appliance and enhancing the quality of the electrical grid.

IPC Classes  ?

• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
• H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
• H02H 3/10 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current additionally responsive to some other abnormal electrical conditions
• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection

Abstract

A power cord having a circuit interrupter such as a leakage current detection interrupter (LCDI) or arc fault circuit interrupter (AFCI), with a detection signal conductor wire in addition to the current carrying wires between the source and the load, and a temperature controlled switch coupled to the detection signal conductor wire on the load side. The temperature controlled switch is affixed to a device under measurement which is associated with the load, and changes its open or closed state when the device overheats. This in turn changes the state of the current flowing in the detection signal conductor wire. In response thereto, the circuit interrupter, which is coupled to the detection signal conductor wire on the source end, interrupts the power supply to the load.

IPC Classes  ?

• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
• H02H 9/08 - Limitation or suppression of earth fault currents, e.g. Petersen coil
• H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
• H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass

Abstract

This invention provides a fireproof separator board, which is made of a flame-retardant, high temperature resistant material and disposed within an insulating casing of an electrical device, for preventing the heat generated by the electrical components of the electrical device from being conducted to the insulating casing. This invention also provides a plug-based circuit interrupter that includes the fireproof separator board. The fireproof separator board and the plug-based circuit interrupter of this invention can effectively prevent high temperature and fire caused by the electrical components that could melt the casing.

IPC Classes  ?

• H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details

Abstract

An arc fault detection circuit for an arc fault circuit interrupter (AFCI). The arc fault detection circuit includes an arc detecting circuit for detecting an arc fault in one or more power supply lines and outputting a detected signal, an arc filtering circuit electrically coupled to an output terminal of the arc detecting circuit for removing signal parts unrelated to the arc fault from the detected signal and outputting a filtered half-cycle signal, and an arc processing circuit electrically coupled to an output terminal of the arc filtering circuit for generating, based on the filtered half-cycle signal received, a processed half-cycle signal characterizing the arc fault. The arc fault detection circuit also includes simulated arc testing circuit that has a user-touchable test switch, and an arc oscillator to generate a simulated arc fault signal for testing the arc fault detection circuit or its respective components.

IPC Classes  ?

• H02H 1/00 - Details of emergency protective circuit arrangements
• H02H 3/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned

Abstract

An arc fault circuit interrupter includes: an insulating casing, electrical input terminals and electrical output terminals, first and second electrical path connected between the electrical input terminals and electrical output terminals, and a movement mechanism. The movement mechanism includes: first and second moving contact arms, electrically coupled to the first and second electrical paths, respectively; a control circuit board; an arc detection mechanism, electrically coupled to the control circuit board, for detecting an arc signal and causing the control circuit board to generate a trip signal; a tripping mechanism, electrically coupled to the control circuit board, for receiving the trip signal to disconnect the electrical coupling between the first moving contact arm and the first electrical path and/or the electrical coupling between the second moving contact arm and the second electrical path. The device can immediately cut off the power when detecting an arc signal to prevent fire hazard.

IPC Classes  ?

• H02H 1/00 - Details of emergency protective circuit arrangements
• H01R 13/713 - Structural association with built-in electrical component with built-in switch the switch being a safety switch
• H01R 103/00 - Two poles
• H01R 24/22 - Coupling parts carrying sockets, clips or analogous contacts and secured only to wire or cable with additional earth or shield contacts

Abstract

A ground-fault circuit interrupter (GFCI) device, including a relay for control a switch to be in an open position or a closed position, the relay including a first coil and a second coil, wherein when both the first coil and the second coil are non-conductive, the switch is caused to be in the open position. The GFCI also includes a relay start circuit connected to the first coil for causing the first coil to be conductive or non-conductive, wherein when the first coil is conductive, the first coil causes the switch to be in the closed position, but after the first coil is conductive, the coil start circuit becomes non-conductive. The GFCI further includes a relay sustain circuit connected to the second coil for causing the second coil to be conductive or non-conductive. In addition, the GFCI includes a ground fault detect circuit for causing both the relay start circuit and the relay sustain circuit to become non-conductive when a fault signal is detected, causing both the first coil and the second coil to be non-conductive, thereby causing the switch to be in the open position.

IPC Classes  ?

• H01H 83/02 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents