Abstract: An electrical network is equipped with feed-in devices, loads, a distribution grid arranged therebetween, at least one semiconductor switch, and at least one electromechanical switch for separating a feed-in device or a load in the event of a fault. The feed-in devices and loads are arranged in groups which are connected together by a busbar and paired semiconductor switches. Each feed-in device and load can be separated from the grid by an electromechanical switch in the event of a fault, and the individual groups of feed-in devices and loads can be separated from one another by the semiconductor switches in the event of a fault in order to prevent cross currents on the busbar.

Abstract: An electric grid includes feed-ins, loads, and a distribution grid, which is arranged therebetween. The distribution grid comprises at least one busbar and at least one device for opening or closing a DC circuit. The at least one device includes an electric switch for opening or closing the DC circuit, a fault current detector, a trigger unit, a precharging device, and a control unit for automatically closing the electric switch after the precharging process. The electric switch opens the DC circuit via the trigger unit if a fault current is detected by the fault current detector, and the precharging device restores the voltage on the busbar prior to closing the electric switch.

Abstract: An electrical network is equipped with feed-in devices, loads, a distribution grid arranged therebetween, at least one semiconductor switch, and at least one electromechanical switch for separating a feed-in device or a load in the event of a fault. The feed-in devices and loads are arranged in groups which are connected together by a busbar and paired semiconductor switches. Each feed-in device and load can be separated from the grid by an electromechanical switch in the event of a fault, and the individual groups of feed-in devices and loads can be separated from one another by the semiconductor switches in the event of a fault in order to prevent cross currents on the busbar.

Abstract: An electric grid includes feed-ins, loads, and a distribution grid, which is arranged therebetween. The distribution grid comprises at least one busbar and at least one device for opening or closing a DC circuit. The at least one device includes an electric switch for opening or closing the DC circuit, a fault current detector, a trigger unit, a precharging device, and a control unit for automatically closing the electric switch after the precharging process. The electric switch opens the DC circuit via the trigger unit if a fault current is detected by the fault current detector, and the precharging device restores the voltage on the busbar prior to closing the electric switch.

Abstract: The invention relates to a hydraulic machine, in particular to a hydraulic motor with two working lines, from one of which a high pressure line and from the other one a low pressure line is branched off. An electronic control unit and a servo displacement unit are provided to control the displacement of the displacement volume of a drive mechanism of the hydraulic machine, wherein the displacement volume can be determinated by the displacement of a servo piston within the servo displacement unit. For this, the servo piston can be loaded at least on one side via a servo pressure line with hydraulic fluid under servo pressure, wherein the servo pressure level can be adjusted by a control spool arranged moveable within a control valve. For this, hydraulic fluid from the low pressure line or, perhaps, from the high pressure line is guidable via the control valve to the servo pressure line if a suitable control signal is available at a switching valve.

Abstract: The invention relates to a hydraulic machine, in particular to a hydraulic motor with two working lines, from one of which a high pressure line and from the other one a low pressure line is branched off. An electronic control unit and a servo displacement unit are provided to control the displacement of the displacement volume of a drive mechanism of the hydraulic machine, wherein the displacement volume can be determinated by the displacement of a servo piston within the servo displacement unit. For this, the servo piston can be loaded at least on one side via a servo pressure line with hydraulic fluid under servo pressure, wherein the servo pressure level can be adjusted by a control spool arranged moveable within a control valve. For this, hydraulic fluid from the low pressure line or, perhaps, from the high pressure line is guidable via the control valve to the servo pressure line if a suitable control signal is available at a switching valve.

Abstract: A hydrostatic displacement unit having pistons which are composed at least partially of a high-grade aluminum material which are made of one piece or a composite to reduce wear.

Abstract: A vehicle (1) having a sound-radiating element (10) for emitting sound waves into a passenger compartment (2) and having an air duct (6) for the air conditioning of the passenger compartment (2), the air duct (6) having an air duct inner wall (7) facing the passenger compartment (2). To reduce the installation space for the sound-radiating element and to simplify the assembly, the sound-radiating element (10) has the air duct inner wall (7) and an oscillation exciter (9) arranged on the air duct inner wall (7), for exciting oscillation of the air duct inner wall (7).

Abstract: The invention relates to a vehicle (1) having a loudspeaker (9) for emitting sound waves (10, 11) into a passenger compartment (2) and having an air duct (7) for the air conditioning of the passenger compartment (2), the air duct (7) having an air duct opening (6) which faces the passenger compartment (2). In order to reduce the installation space for the loudspeaker (9), the invention proposes that the loudspeaker (9) is arranged in the air duct (7) in such a manner that the sound waves (10, 11) can be emitted through the air duct opening (6) into the passenger compartment (2).

Abstract: The invention relates to a vehicle (1) having a sound-radiating element (10) for emitting sound waves into a passenger compartment (2) and having an air duct (6) for the air conditioning of the passenger compartment (2), the air duct (6) having an air duct inner wall (7) facing the passenger compartment (2). In order to reduce the installation space for the sound-radiating element and to simplify the assembly, the invention proposes that the sound-radiating element (10) has the air duct inner wall (7) and an oscillation exciter (9) arranged on the air duct inner wall (7), for exciting oscillation of the air duct inner wall (7).

Abstract: A surge pot intended for mounting in a fuel tank has a walling with a circumferential elastic insert. In this way, the surge pot has in a mounting position a small cross section with which it can be passed through a mounting opening in the fuel tank. After the mounting, the elastic insert is pressed outward so that the surge pot can receive a particularly large amount of fuel.

Abstract: A coat hanger includes first and second jaws designed to grasp and hold a coat. The jaws are each pivotally attached to a supporting structure and a small metal rod is pivotally attached between the jaws. Through the use of the metal rod, an increased gripping force is achieved in proportion to an increased weight.