A system for overvoltage protection on loads for use in an electric aircraft is presented. The system includes an energy storage element configured to produce an electrical output, a bus element, wherein the bus is configured to transfer the electrical output from the energy storage element, a plurality of inverters, wherein each inverter is configured to generate a regulated output as a function of the electrical output and detect an overvoltage output as a function of the regulated output, and a plurality of load devices connected to the plurality of inverters, wherein each load device includes a fault protection device.

The present application provides a surge protection circuit, a lightning protector and an electronic device. The surge protection circuit includes a first protection module, the first protection module comprises a first protection sub-module and a second protection sub-module electrically connected to the first protection sub-module. The first protection sub-module is used for surge protection during a first surge input, the second protection sub-module is used for surge protection during a second surge input protection, and the second surge strength is higher than the strength of the first surge. The surge protection circuit, lightning protection and electronic equipment could provide different levels of surge protection for different levels of surge and could greatly enhance the sensitivity of lightning protection.

The present application provides a surge protection circuit, a lightning protector and an electronic device. The surge protection circuit includes a first protection module, the first protection module comprises a first protection sub-module and a second protection sub-module electrically connected to the first protection sub-module. The first protection sub-module is used for surge protection during a first surge input, the second protection sub-module is used for surge protection during a second surge input protection, and the second surge strength is higher than the strength of the first surge. The surge protection circuit, lightning protection and electronic equipment could provide different levels of surge protection for different levels of surge and could greatly enhance the sensitivity of lightning protection.

A method of operating a Fault Current Limiter Circuit Breaker including a plurality of FLCB modules connected in series, including at least a first module and a second module. Each module has a plurality of parallel component legs including a mechanical switch leg having a mechanical switch, a semiconductor switch leg having a semiconductor switch, and a Metal Oxide Varistor leg having a MOV. The method includes, when the FLCB is in an open configuration, obtaining an indication that the FLCB should be closed; in response to the obtained indication, closing the semiconductor switch of each of the modules; and, after the closing of the semiconductor switches and while the mechanical switch of the second module remains open, closing the mechanical switch of the first module.

A system in a vehicle includes a first fuse connected between a power source and a load. The first fuse is an electronic fuse (eFuse) to disconnect the load from the power source via the first fuse based on detecting a failure in the first fuse. The system also includes a second fuse connected between the power source and the load, the first fuse and the second fuse being part of a cluster of fuses. The second fuse is an eFuse and the first fuse signals the second fuse to disconnect the load from the power source via the second fuse based on the first fuse detecting the failure in the first fuse without the second fuse detecting a failure in the second fuse.

A safety switching apparatus for safely switching on an electrical load includes for this purpose, the functionality of two non-forcibly guided changeover switches and, in particular, their normally closed contacts, which can be monitored during a starting process without using a microcontroller. The normally closed contacts are each arranged in a separate diagnostic circuit, which are connected in parallel with respect to a test voltage. The diagnostic circuits are each monitored by a diagnostic current detection device. The excitation coils of the changeover switches can each be short-circuited via a short-circuit device if a diagnostic current continues to flow in the respective diagnostic circuit for a predetermined time period after an activated starting process.

A safety switching apparatus for safely switching on an electrical load includes for this purpose, the functionality of two non-forcibly guided changeover switches and, in particular, their normally closed contacts, which can be monitored during a starting process without using a microcontroller. The normally closed contacts are each arranged in a separate diagnostic circuit, which are connected in parallel with respect to a test voltage. The diagnostic circuits are each monitored by a diagnostic current detection device. The excitation coils of the changeover switches can each be short-circuited via a short-circuit device if a diagnostic current continues to flow in the respective diagnostic circuit for a predetermined time period after an activated starting process.

A system in a vehicle includes a first fuse connected between a power source and a load. The first fuse is an electronic fuse (eFuse) to disconnect the load from the power source via the first fuse based on detecting a failure in the first fuse. The system also includes a second fuse connected between the power source and the load, the first fuse and the second fuse being part of a cluster of fuses. The second fuse is an eFuse and the first fuse signals the second fuse to disconnect the load from the power source via the second fuse based on the first fuse detecting the failure in the first fuse without the second fuse detecting a failure in the second fuse.

A system for overvoltage protection on loads for use in an electric aircraft is presented. The system includes an energy storage element configured to produce an electrical output, a bus element, wherein the bus is configured to transfer the electrical output from the energy storage element, a plurality of inverters, wherein each inverter is configured to generate a regulated output as a function of the electrical output and detect an overvoltage output as a function of the regulated output, and a plurality of load devices connected to the plurality of inverters, wherein each load device includes a fault protection device.

A power supply control apparatus includes: a first connection device provided in an inter-system line that connects a first system as defined herein and a second system as defined herein; a second connection device as defined herein; and a controller that brings the first connection device and the second connection device into a disconnected state and performs a first fail-safe control using the electric power of the first power supply when a ground fault of the second system is detected, and that brings the first connection device into a conductive state while keeping the second connection device in a disconnected state and performs a second fail-safe control using the electric power of the second power supply when a failure of the first power supply is detected during the first fail-safe control.