Abstract: A circuit breaker for interrupting a direct current, in particular in a power supply system in a vehicle having a main current path that includes a switch, and having a reed relay for detecting an electric current flow across the main current path. The switch is coupled to the reed relay. Also, a use of a circuit breaker is provided.

Abstract: A separating device for interrupting a direct current of a current path, in particular for an on-board electrical system of a motor vehicle. The separating device has a hybrid switch with a current-conducting mechanical contact system and a first semiconductor switch connected to the hybrid switch in parallel and having a switchable resistance cascade with at least one ohmic resistor which is connected to the contact system of the hybrid switch in parallel.

Abstract: an overvoltage protector for protecting a device to be protected, having a first terminal and a second terminal. A number of strings are connected in parallel to one another between the first terminal and the second terminal, each string having a resistor, and at least one of the strings comprising a switching element that is connected in series to the resistor of the string. A circuit having an overvoltage protector, a use of an overvoltage protector, and a method for operating an overvoltage protector is also provided.

Abstract: An input voltage is converted into a higher output voltage by several voltage stages each having a series circuit with a rectifier diode, a charging capacitor, and a switchable first semiconductor switch. Each voltage stage has a switchable second semiconductor switch is connected in parallel with the rectifier diode and the charging capacitor. The rectifier diodes of adjacent voltage stages are connected in series. First, the first semiconductor switches are closed and the second semiconductor switches are opened, to charge the charging capacitors by the input voltage. Then, the first semiconductor switches are opened and the second semiconductor switches are closed, so that the individual voltages produced on the charging capacitors add up along the series-connected rectifier diodes to produce the output voltage.

Abstract: A disconnecting device for interrupting current, in particular of a circuit breaker, having a switch and a voltage limiter connected in parallel to the switch. The voltage limiter has a number of parallel-connected phases, each phase including a resistor. At least one of the phases includes a switching element, which is connected in series to the resistor of the phase.

Abstract: A separating device for interrupting a direct current of a current path, in particular for an on-board electrical system of a motor vehicle. The separating device has a hybrid switch with a current-conducting mechanical contact system and a first semiconductor switch connected to the hybrid switch in parallel and having a switchable resistance cascade with at least one ohmic resistor which is connected to the contact system of the hybrid switch in parallel.

Abstract: A circuit breaker for interrupting a direct current, in particular in a power supply system in a vehicle having a main current path that includes a switch, and having a reed relay for detecting an electric current flow across the main current path. The switch is coupled to the reed relay. Also, a use of a circuit breaker is provided.

Abstract: A circuit breaker for interrupting a direct current, in particular in a power supply system in a vehicle having a main current path that includes a switch, and having a reed relay for detecting an electric current flow across the main current path. The switch is coupled to the reed relay. Also, a use of a circuit breaker is provided.

Abstract: A method for controlling an electronic semiconductor switch connected in a load current circuit, the semiconductor switch being connected between an input terminal routed to a source and an output terminal of the load current circuit routed to a load. A control circuit is connected to a supply voltage and has a bridge circuit connected on the primary side to a transformer and to the supply voltage. A load circuit is connected to the transformer on the secondary side, the load circuit having a driver circuit for the semiconductor switch. A threshold value signal is routed to the bridge circuit on the control side. The bridge circuit generates a primary signal which is transmitted as a secondary signal to the load circuit that is galvanically isolated from the control circuit, and wherein the secondary signal is fed to the driver circuit, which generates a drive signal for the semiconductor switch.

Abstract: A disconnecting device for interrupting a direct current between a direct current source and an electric apparatus, having a current-conducting mechanical switch, a power electronics unit connected thereto, and an energy store which is charged by an arcing voltage generated on the switch by an arc as the switch is being disconnected. A pulse generator that is connected to the energy store triggers at least one semiconductor switch of the power electronics unit in such a way that the power electronics unit short-circuits the switch and the arc is extinguished.

Abstract: an overvoltage protector for protecting a device to be protected, having a first terminal and a second terminal. A number of strings are connected in parallel to one another between the first terminal and the second terminal, each string having a resistor, and at least one of the strings comprising a switching element that is connected in series to the resistor of the string. A circuit having an overvoltage protector, a use of an overvoltage protector, and a method for operating an overvoltage protector is also provided.

Abstract: An input voltage is converted into a higher output voltage by several voltage stages each having a series circuit with a rectifier diode, a charging capacitor, and a switchable first semiconductor switch. Each voltage stage has a switchable second semiconductor switch is connected in parallel with the rectifier diode and the charging capacitor. The rectifier diodes of adjacent voltage stages are connected in series. First, the first semiconductor switches are closed and the second semiconductor switches are opened, to charge the charging capacitors by the input voltage. Then, the first semiconductor switches are opened and the second semiconductor switches are closed, so that the individual voltages produced on the charging capacitors add up along the series-connected rectifier diodes to produce the output voltage.

Abstract: An interrupter device for interrupting a direct current between a direct current source and an electrical device, for example, between a photovoltaic generator and an inverter. The interrupter device has a mechanical switch which has a first fixed contact, a second fixed contact, and a contact bridge that can be moved between a first position and a second position. The contact bridge and the first fixed contact are electrically contacted to a semiconductor switch which blocks a current when the contact bridge is in the first position. A control input of the semiconductor switch is connected to the mechanical switch such that an arc voltage generated as a result of an arc across the switch connects the semiconductor switch so as to conduct a current when the contact bridge is moved into the second position.

Abstract: A disconnecting device for interrupting current, in particular of a circuit breaker, having a switch and a voltage limiter connected in parallel to the switch. The voltage limiter has a number of parallel-connected phases, each phase including a resistor. At least one of the phases includes a switching element, which is connected in series to the resistor of the phase.

Abstract: A method for controlling an electronic semiconductor switch connected in a load current circuit, the semiconductor switch being connected between an input terminal routed to a source and an output terminal of the load current circuit routed to a load. A control circuit is connected to a supply voltage and has a bridge circuit connected on the primary side to a transformer and to the supply voltage. A load circuit is connected to the transformer on the secondary side, the load circuit having a driver circuit for the semiconductor switch. A threshold value signal is routed to the bridge circuit on the control side. The bridge circuit generates a primary signal which is transmitted as a secondary signal to the load circuit that is galvanically isolated from the control circuit, and wherein the secondary signal is fed to the driver circuit, which generates a drive signal for the semiconductor switch.

Abstract: A switching and protection device for high-voltage onboard electrical systems having a DC-voltage switch and a fuse, wherein the DC-voltage switch includes a housing, at least two fixed contacts, and a bridge designed to be movable with respect to the fixed contacts, wherein the bridge is formed from an electric insulator, wherein two contacts are arranged on the bridge such that, during a movement of the bridge in the direction of the fixed contacts, the two contacts make contact with the fixed contacts, wherein the two contacts arranged on the bridge are electrically connected to each other via the fuse.

Abstract: A circuit breaker for interrupting a direct current, in particular in a power supply system in a vehicle having a main current path that includes a switch, and having a reed relay for detecting an electric current flow across the main current path. The switch is coupled to the reed relay. Also, a use of a circuit breaker is provided.

Abstract: An interrupter device for interrupting a direct current between a direct current source and an electrical device, for example, between a photovoltaic generator and an inverter. The interrupter device has a mechanical switch which has a first fixed contact, a second fixed contact, and a contact bridge that can be moved between a first position and a second position. The contact bridge and the first fixed contact are electrically contacted to a semiconductor switch which blocks a current when the contact bridge is in the first position. A control input of the semiconductor switch is connected to the mechanical switch such that an arc voltage generated as a result of an arc across the switch connects the semiconductor switch so as to conduct a current when the contact bridge is moved into the second position.

Abstract: A disconnecting device for interrupting a direct current between a direct current source and an electric apparatus, having a current-conducting mechanical switch, a power electronics unit connected thereto, and an energy store which is charged by an arcing voltage generated on the switch by an arc as the switch is being disconnected. A pulse generator that is connected to the energy store triggers at least one semiconductor switch of the power electronics unit in such a way that the power electronics unit short-circuits the switch and the arc is extinguished.

Abstract: A DC voltage switch for high-voltage on-board electrical systems having a housing, at least two stationary contacts, and a moving contact, wherein, in each case, a first contact region of the stationary contacts is routed out of the housing and, in each case, a second contact region of the stationary contacts is arranged in a switching chamber of the housing with the moving contact, wherein the housing is hermetically encapsulated, wherein a cooling chamber which is separated from the switching chamber by a partition wall is arranged above the switching chamber, wherein the partition wall has at least one outlet opening and at least one inlet opening.