Abstract: A residual current circuit breaker and a system including the residual current circuit breaker are provided. The residual current circuit breaker includes: a first switch connected in series between a power supply of the residual current circuit breaker and a load; a second switch connected in series between a standby power supply and the load; and a control means that controls to open the first switch and close the second switch in response to a residual current of a main loop of the residual current circuit breaker exceeding a predetermined threshold, wherein a voltage of the standby power supply is higher than a lowest value of a voltage required for the load to operate and lower than a highest value of a safe voltage, and wherein the first switch and the second switch are mutually exclusive.

Abstract: According to an embodiment of the present disclosure, there is provided a solid-state circuit breaker and its self-test method.

Abstract: Embodiments of the present disclosure provides a solid state circuit breaker, comprising: a first switch; a second switch, connected in series with the first switch in a circuit to be protected; an operation switch, connected to the second switch, wherein the second switch is closed in a case that the operation switch is in a closed position, and is opened in a case that the operation switch is in an opened position; a micro switch, connected to the operation switch, and cable of being driven to a predetermined opened position by the operation switch during the process of the operation switch being switched from the closed position to the opened position; a position detection circuit, connected to the micro switch, capable of generating an opening feedback signal in a case that the micro switch is driven to a predetermined opened position; a control unit, connected to the position detection circuit to receive an opening feedback signal, capable of generating a predetermined opening signal based on the opening

Abstract: There is provided a solid-state switch device connected between a single-phase power supply source and a load, including: a phase bridge arm circuit, including a first and a second power semiconductor switches, which each includes a first, a second and a control ends and each includes a body diode, wherein the second ends of the first and the second power semiconductor switches are connected in series in phase of a single-phase power supply source; a phase voltage sampling circuit, configured to acquire sampled values of phase voltage of the phase bridge arm circuit; and a control circuit, configured to determine direction of the phase voltage according to the sampled values, turn on one of the power semiconductor switches whose body diode direction is the same as the direction of the phase voltage, and turn on the other within a half cycle after the immediate zero-crossing of the phase voltage.

Abstract: A system architecture of a fast transfer switch is provided, which includes a main power loop configured to be connected to at least two power supplies, transfer between the at least two power supplies, and output an AC signal; a first parallel bypass module configured to output an AC signal, the first parallel bypass module including an independent power supply; the main controller is configured to, in response to detecting the abnormality of the first power supply of the at least two power supplies, adjust the AC signal output by the first parallel bypass module during the transfer of the main power loop between the at least two power supplies, so as to transfer from the first power supply outputting the AC signal via the main power loop to the second power supply of the at least two power supplies outputting the AC signal via the main power loop.

Abstract: A solid-state motor starter which includes three electronic switching modules is disclosed. The solid-state motor starter includes: an energy absorbing circuit, which includes a transient diode array including at least one transient diode branch, each branch includes at least one transient diode connected in series in the same direction, and the branches are connected in parallel in the same direction, and the transient diode array has a cathode and an anode connection end; a first and a second three-phase bridge rectifier circuit, which are composed of rectifier diodes. The input or output of each electronic switching module is connected to the midpoint of one of the bridge arms of the first or second three-phase bridge rectifier circuit. The positive poles and the negative poles of the first and second three-phase bridge rectifier circuit are connected to the cathode and anode connection end of the transient diode array.

Abstract: A bidirectional operation mechanism for a switching device and a switching device assembly. The bidirectional operation mechanism includes: a housing; an operation handle; a first driving member, rotatably installed to the housing, fixedly connected to the operation handle; a second driving member, rotatably installed to the housing, operatively connected to the first driving member and the switching device, upon an external force acting on the operation handle to drive the operation handle rotate between the closed position and the open position, the operation handle drives the first driving member to rotate together, so that the first driving member abuts against and drives the second driving member to rotate, enabling the switching device to perform a closing operation and an opening operation.

Abstract: The present disclosure discloses a solid-state circuit breaker including an electronic switch and a mechanical switch connected in series, the mechanical switch includes: a handle micro-switch, configured to be actuated upon the handle rotating to the on position and released upon the handle leaving the on position; a contact micro-switch, installed to the housing and configured to be actuated upon the movable contact moving to a closed position and released upon the movable contact leaving the closed position. By detecting a state of the handle micro-switch and a state of the contact micro-switch, it is achieved that, upon the solid-state circuit breaker being switched from off to on, the mechanical switch is turned on first, and then the electronic switch is turned on, upon the solid-state circuit breaker being switched from on to off, the electronic switch is turned off first, and then the mechanical switch is turned off.

Abstract: According to an aspect of the present disclosure, there is provided a switching circuit including a main power supply circuit connected between power sources and a load, wherein the power sources include a first power source and a second power source, and the main power supply circuit includes a transfer switch connected between the power sources and the load and configured to switch between the first power source and the second power source; and a power electronic switch for turning on or off the main power supply circuit, wherein the power electronic switch is connected between the transfer switch and the load.

Abstract: The present disclosure describes techniques for facilitating collaboration in a workspace. The techniques may comprise automatically displaying an avatar of a user in a representation corresponding to a first virtual room once an application starts to run on a computing device associated with the user. Display of the avatar in the representation may indicate that the user is in the first virtual room. A collaborative mode may be entered based on user input from the user. A visual element may be added to the avatar in response to entering the collaborative mode. The visual element added to the avatar may indicate that the user is available for a real-time communication with other users among the plurality of users.

Abstract: The present disclosure describes techniques for facilitating a collaborative environment. The techniques may comprise aggregating data shared by at least a subset of a plurality of users via a plurality of message threads and a plurality of virtual rooms in the collaborative environment. The data may be categorized into a plurality of categories based on determining relatedness of the data. Data associated with any category among the plurality of categories may be classified based on a plurality of types of the data associated with the category. One of the plurality of types of the data associated with the category may be displayed on a first computing device associated with a first user among the plurality of users.

Abstract: A power distribution device is disclosed. The power distribution device includes: a first power source input end for connecting a first power source; a second power source input end for connecting a second power source; a first power source switch for connecting a first power source input end with a bus and switching on and off the power supply of the first power source; a second power source switch for connecting a second power source input end with a bus and switching on and off the power supply of the second power source; the bus for connecting with a load device and supplying power for the load device; and a load device switch for switching on and off the power supply to a relevant load device. Furthermore, A power distribution system is also disclosed.

Abstract: A circuit breaker is disclosed, including: an input side including a first input end and a second input end for respectively connecting to a first line and a second line of a power supply; an output side including a first output end and a second output end for respectively connecting two ends of an electric load to form a load loop; a switch unit arranged between the input side and the output side for turning on and turning off the load loop; a current detection unit for detecting a loop current of the load loop; a voltage detection unit for detecting a loop voltage between the first line and the second line; a control circuit including at least one comparator, the control circuit is configured for controlling whether to turn off the switch unit according to comparison results.

Abstract: The present disclosure relates to a power distribution equipment and an operation method thereof. The power distribution equipment includes: a main switch, a power supply end of which being connected to a power distribution network; at least one branch switch, a power supply end of each of the at least one branch switch being connected to a load end of the main switch; a main measurement module that measures a total voltage and a total current associated with the main switch; at least one auxiliary measurement module, each of which measuring a branch current associated with one of the at least one branch switch; and a control module configured to determine an abnormality associated with a first branch switch of the at least one branch switch; and control a disconnection associated with the first branch switch in response to the abnormality.

Abstract: Embodiments of the present disclosure relate to a method, apparatus for operating a conduction assembly, a start device, and a computer-readable medium. The conduction assembly is coupled between an AC power supply and an inductive load, and comprises a first switch device and a second switch device which are in anti-series connection, the first switch device comprises a first body diode in anti-parallel connection with the first switch device, and the second switch device comprises a second body diode in anti-parallel connection with the second switch device.

Abstract: A power distribution terminal provided with a display module, a wireless power distribution display system and a wireless power distribution display method are disclosed. The wireless power distribution display system includes a local gateway, and at least two power distribution terminals which are communicated with the local gateway in a short-distance wireless communication mode and send their terminal identification data to the local gateway; at least one of the at least two power distribution terminals is provided with a display module; the local gateway outputs the terminal identification data in a short-distance wireless communication mode; and the at least one power distribution terminal provided with a display module receives the terminal identification data of other distribution terminals from the local gateway in a short-distance wireless communication mode, and displays the terminal identification data.