Abstract: There is provided a quick automatic transfer switch device and an operating method thereof, including: a first power source input end; a second power source input end; output end; a first switch element coupled between the first power source input end and a third switch element; a second switch element coupled between the second power source input end and the third switch element; the third switch element coupled between the first and second switch elements and the output end; a fourth switch element coupled with the first power source input end and the second power source input end and coupled to a power source transfer circuit; the power source transfer circuit coupled with the fourth switch element and the output end; and a control circuit.

Abstract: A hybrid fast transfer switch and a method for fast switching between power sources using the same are provided. The hybrid fast transfer switch includes: a mechanical switch including a first stationary contact, a second stationary contact and a movable contact, wherein the first stationary contact is connected to a first power source, the second stationary contact is connected to a second power source, and the movable contact is connected to a load; a first diversion branch connected between the first power source and the load; a first energy absorption branch connected between the first power source and the load; a second diversion branch connected between the second power source and the load; and a second energy absorption branch connected between the second power source and the load.

Abstract: The present invention discloses a power source transfer circuit for switching among a plurality of power sources to supply power to a load. The power source transfer circuit includes a first switch, a second switch and a bypass switch, wherein one of the plurality of power sources supplies power to the load via the first switch and the second switch, and wherein the bypass switch is connected in parallel to the second switch on a neutral line and is configured to control neutral overlapping duration during switching among the plurality of power sources. The power source transfer circuit including a bypass switch provided by the present disclosure can reduce the neutral overlapping duration to microseconds during power source transfer, so as to realize fast and reliable response.

Abstract: A power source automatic transfer device is provided, including: a first and second power source input end; an auxiliary power supply unit whose electric energy is acquired from a first and second power source; a device output end connected to a load; and a power source switchover unit including a control unit and a power source switchover switch, the power source switchover switch including a first and second power source switchover switch, wherein a first input end of the first and second power source switchover switch are respectively connected to the first power source input end and the second power source input end, a second input end of the first and second power source switchover switch are both connected to an output end of the auxiliary power supply unit, and an output end of the first and second power source switchover switch are connected with the device output end.

Abstract: A dual power supply transfer switch (SSATS) for switching between a first power supply (S1) and a second power supply (S2) to supply power to a load is provided, includes: a solid-state switch (SS); a mechanical switch (CTR); and a compensation power module (AUX). In the case that the S1 fails in supplying power to the load, the AUX uses the S2 to supply power to the load, and the output current of the S1 is reduced. After satisfying the turn off condition for the SS, the SS turns off the S1, the CTR turns off the S1 and turns on the S2. After the S2 is adjusted to synchronize with the phase of the output current of the S1, the SS turns on the S2 and the AUX stops outputting current. The SSATS provides advantages such as fast transfer, zero interruption, and short voltage sag time.

Abstract: Embodiments of the present disclosure provide an electrical device, a method for controlling a solid state circuit breaker electrical device, and a computer-readable storage medium. The method comprises: in a closed state of a mechanical switch of the electrical device, closing one of a plurality of electronic switches of the electrical device within a predetermined time period before a zero-crossing point of an input voltage of a bus circuit to which the electrical device is connected; acquiring a current value or a voltage value of a sampling resistor in the electrical device within the predetermined time period; and in response to determining that the current value or the voltage value as acquired is less than or equal to a predetermined threshold, causing an indication component to indicate that there is no short circuit fault in the bus circuit.

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: 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: The disclosure provides an apparatus, a method and a storage medium for address assignment. The address assignment apparatus comprises: a gateway configured to generate an address signal that enables address assignment; an address assignment line coupled to the gateway to receive the address signal, the address assignment line is provided with a plurality of switches; a plurality of connection units disposed in series along the address assignment line and each adapted to be connected to a bus device, each of the plurality of switches is located within one of the plurality of connection units, each of the plurality of connection units is further adapted to: couple the address assignment line to the bus device, control an on-off state of a switch located within the connection unit according to a switch control signal from the connected bus device to control a delivery of the address signal to a downstream connection unit.

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: 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: An apparatus for generating a self-check leakage current is disclosed. The apparatus includes: a mechanical switch; a phase line solid-state switch arranged on a phase line and located upstream of the mechanical switch; a current transformer arranged upstream of the phase line solid-state switch; a bypass unit including a bypass switch and a bypass resistor, one end of the bypass unit is connected between the mechanical switch and the solid-state switch on the phase line, and the other end is connected to the upstream of the current transformer on the neutral line; A control unit for controlling the switching on and off of the phase line solid-state switch and the bypass switch and to receive the current value detected by the current transformer, wherein the self-check leakage current is generated when the phase line solid-state switch and the bypass switch are switched on.

Abstract: The present disclosure relates to a power supply circuit and an electrical device. The power supply circuit includes: a first switch; a first capacitor connected in series with the first switch; a voltage sampling device configured to detect a voltage of the first capacitor and/or a power supply bus to which the power supply circuit is connected; and a control circuit configured to output a control signal based on the detected voltage, wherein the first switch is configured to be switched on or off based on the control signal. In this way, a low-voltage withstanding capacitor with a large capacitance can be achieved in the power supply circuit by switching out the capacitor when the power supply bus voltage is high and switching in the capacitor to assist in power supply when the power supply bus voltage is low.

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: The present invention discloses a power source transfer circuit for switching among a plurality of power sources to supply power to a load. The power source transfer circuit includes a first switch, a second switch and a bypass switch, wherein one of the plurality of power sources supplies power to the load via the first switch and the second switch, and wherein the bypass switch is connected in parallel to the second switch on a neutral line and is configured to control neutral overlapping duration during switching among the plurality of power sources. The power source transfer circuit including a bypass switch provided by the present disclosure can reduce the neutral overlapping duration to microseconds during power source transfer, so as to realize fast and reliable response.