Abstract: A circuit breaker for interrupting an electrical circuit when current limit values and/or current/time period limit values are exceeded has an energy transducer, the primary side of which is connected to the electrical circuit and the secondary side of which provides a power supply for at least one control unit of the circuit breaker. A first rectifier circuit and a second rectifier circuit are connected to the secondary-side output of the energy transducer. The first rectifier circuit is connected to the secondary-side output of the energy transducer via a capacitor.

Abstract: A circuit breaker for interrupting an electrical circuit when current limit values and/or current/time period limit values are exceeded has an energy transducer, the primary side of which is connected to the electrical circuit and the secondary side of which provides a power supply for at least one control unit of the circuit breaker. A first rectifier circuit and a second rectifier circuit are connected to the secondary-side output of the energy transducer. The first rectifier circuit is connected to the secondary-side output of the energy transducer via a capacitor.

Abstract: A power switch is for interrupting an electrical circuit when current and/or current time span threshold values are exceeded. The power switch includes an energy converter, which on the primary side is connected to the electrical circuit, and on the secondary side provides an energy supply for at least one control unit of the power switch. The energy converter has a core having a remanence flux density (Br2) of less than 30% of the saturation flux density (Bs2) or a coercive field strength (Hc2) of less than 10 A/m.

Abstract: An injection unit has an injector arrangement connected to a pressure reservoir by a pressure line arrangement The injector arrangement has at least one servo injection valve and a control valve for the release of fuel from a control chamber into a fuel return line leading to the fuel tank The Valve may be operated by a piezoelectric actuator to cause a displacement of a nozzle body in the direction of an injection passage opening for initiating an injection process by pressure reduction in the control chamber. The fuel return line has a controllable valve, which restricts the fuel flow in the fuel return line in the actuated state. It is, thus, possible to reduce the effects of a change of length of the piezoelectric actuator, which exceeds the so-called tolerance gap in the servo injection valve, which are detrimental to the operation of the injection unit.

Abstract: An injection unit has an injector arrangement connected to a pressure reservoir by a pressure line arrangement The injector arrangement has at least one servo injection valve and a control valve for the release of fuel from a control chamber into a fuel return line leading to the fuel tank The Valve may be operated by a piezoelectric actuator to cause a displacement of a nozzle body in the direction of an injection passage opening for initiating an injection process by pressure reduction in the control chamber. The fuel return line has a controllable valve, which restricts the fuel flow in the fuel return line in the actuated state. It is, thus, possible to reduce the effects of a change of length of the piezoelectric actuator, which exceeds the so-called tolerance gap in the servo injection valve, which are detrimental to the operation of the injection unit.