Abstract: A motor starter whose production is improved is specified. In at least one embodiment, the motor starter includes a power semiconductor switch, an electromechanical bypass switch connected in parallel therewith, and control electronics to drive the bypass switch. In at least one embodiment, the control electronics are in the form of a printed circuit board assembly which is fixed to the bypass switch in an installed position, and the printed circuit board assembly and the bypass switch are designed such that, when being fixed, the printed board assembly makes electrical contact with the bypass switch at the same time.

Abstract: At least one embodiment of the invention relates to a protective circuit for protection of an appliance, in particular of an electric motor, against thermal overloading. In at least one embodiment, the protective circuit includes a first and a second terminal for connecting a temperature detection element; a detection unit for detecting whether a resistance value of the temperature detector element which is connected between the first and the second terminals, is in a first or a second resistance range; a short-circuit detector for identifying whether there is a short circuit between the first and the second terminals; signaling outputs for emitting signal messages to an evaluation unit when the detected resistance value is in the second resistance range and/or when a short circuit has been identified by the short-circuit detector; and a third terminal, which is connected to the second terminal via a predetermined resistance.

Abstract: A semiconductor switching module includes a power semiconductor element that is embodied in planar technology. In at least one embodiment, the power semiconductor element is provided with a base layer, a copper layer, and at least one power semiconductor chip that is mounted on the copper layer, and another electrically conducting layer which covers at least one load terminal of the power semiconductor chip. According to at least one embodiment of the invention, devices are provided for safely connecting the load terminal to a load circuit. The devices are configured such that a contact area thereof presses in a planar manner onto the electrically conducting layer.

Abstract: In order to enable in a motor system, in which a soft start of the motor has been implemented, the operation of the motor, wherein the power consumption is reduced, it is proposed to operate the driver circuit during a switch-on phase in order to carry out a soft start of the motor. In at least one embodiment, the driver circuit can be bypassed in a normal operational phase as a function of a load, by means of which the motor is operated.

Abstract: At least one embodiment of the invention relates to a protective circuit for protection of an appliance, in particular of an electric motor, against thermal overloading. In at least one embodiment, the protective circuit includes a first and a second terminal for connecting a temperature detection element; a detection unit for detecting whether a resistance value of the temperature detector element which is connected between the first and the second terminals, is in a first or a second resistance range; a short-circuit detector for identifying whether there is a short circuit between the first and the second terminals; signaling outputs for emitting signal messages to an evaluation unit when the detected resistance value is in the second resistance range and/or when a short circuit has been identified by the short-circuit detector; and a third terminal, which is connected to the second terminal via a predetermined resistance.

Abstract: In a switching device with two controlled phases, in which each phase is associated with a respective printed circuit board assembly with at least one component to be cooled on a heat sink, the heat sink has a T-shaped cross section transversely with respect to its extent direction. In at least one embodiment, the printed circuit board assemblies are arranged on both sides of the center limb of the heat sink, with the components of the two printed circuit board assemblies facing one another and resting on in each case one side of the center limb.

Abstract: A motor starter whose production is improved is specified. In at least one embodiment, the motor starter includes a power semiconductor switch, an electromechanical bypass switch connected in parallel therewith, and control electronics to drive the bypass switch. In at least one embodiment, the control electronics are in the form of a printed circuit board assembly which is fixed to the bypass switch in an installed position, and the printed circuit board assembly and the bypass switch are designed such that, when being fixed, the printed board assembly makes electrical contact with the bypass switch at the same time.

Abstract: In a switching device with two controlled phases, in which each phase is associated with a respective printed circuit board assembly with at least one component to be cooled on a heat sink, the heat sink has a T-shaped cross section transversely with respect to its extent direction. In at least one embodiment, the printed circuit board assemblies are arranged on both sides of the center limb of the heat sink, with the components of the two printed circuit board assemblies facing one another and resting on in each case one side of the center limb.

Abstract: A semiconductor switching module includes a power semiconductor element that is embodied in planar technology. In at least one embodiment, the power semiconductor element is provided with a base layer, a copper layer, and at least one power semiconductor chip that is mounted on the copper layer, and another electrically conducting layer which covers at least one load terminal of the power semiconductor chip. According to at least one embodiment of the invention, devices are provided for safely connecting the load terminal to a load circuit. The devices are configured such that a contact area thereof presses in a planar manner onto the electrically conducting layer.

Abstract: An electronic appliance is especially easy to assemble and includes a housing and a circuit carrier which is held in the housing. The circuit carrier is guided in the housing in a displaceable manner and is applied by at least one spring element against a housing abutment which accurately centres the circuit carrier.

Abstract: A control input of an electrical device is disclosed, which is resistant to parasitic currents and which is especially suitable for a large bandwidth of various driving voltages. For this purpose, a control input circuit includes a constant current sink connected to a control line, whose current consumption during the duration of the detection pulse assumes a detection value relative which the power consumption between two successive detection pulses is reduced. The circuit also includes an evaluation module that analyzes the input current flowing in the control line and that indicates a control signal if, during the detection pulse, the input current does not fall below a predetermined switch-on value for a predetermined duty cycle.

Abstract: A protective device is for a consumer branch. In order to find an easy, constructive solution which is used to protect the consumer branch in a comprehensive manner, the protective device includes a first protective element to provide motor and line protection, and an integrated second protective element with a fuse, to protect against a short-circuit.

Abstract: An aim is to make wiring accessories in distribution boards more compact. The aim is achieved by integrating fuses in switching protective devices that are used for functional switching, interrupting, and overload protection such that switching protective devices including fuses can be produced in a housing while short-circuit protection can be coupled to the interruption function if necessary by isolating one fuse from the contact/s.

Abstract: A control input of an electrical device is disclosed, which is resistant to parasitic currents and which is especially suitable for a large bandwidth of various driving voltages. For this purpose, a control input circuit includes a constant current sink connected to a control line, whose current consumption during the duration of the detection pulse assumes a detection value relative which the power consumption between two successive detection pulses is reduced. The circuit also includes an evaluation module that analyzes the input current flowing in the control line and that indicates a control signal if, during the detection pulse, the input current does not fall below a predetermined switch-on value for a predetermined duty cycle.

Abstract: A semiconductor relay includes an essentially parallelepiped-shaped housing that has a fastening side and four lateral surfaces, which are perpendicular thereto, and has a front side, which is opposite the fastening side. These lateral surfaces and front side serve as connecting sides. At least one electrical connecting element and at least one mechanical connecting element for connecting a functional module, which can be connected to the housing, are provided on a number of connecting sides.

Abstract: A method with which the load current and thus the load moment of an asynchronous motor that is controlled via a phase-controlled two-phase thyristor power controller, can be easily influenced so as to allow a smooth starting operation. According to a first embodiment, the ignition point is determined in the controlled phase in order to adapt the flow angles of the subsequent current half waves. According to a second embodiment, the ignition point of the subsequent current half waves is brought forward in both controlled phases.

Abstract: The invention relates to a device (1) and an arrangement (2) for fixing a profiled part (4) to a bearing rail (5) which are simple and economical to manufacture. According to the invention, an adapter-type discrete connecting element (3) is used. Said connecting element comprises fixing means (6) which can be connected to the profiled part (4) and second (6) fixing means (7) which can be connected to the bearing rail (5).

Abstract: The invention relates to a protective circuit for a breaker gap (2), said gap being used to connect a load voltage (UL) to a load (1). The circuit is characterized in that a voltage detection circuit (3) is connected to a detection point (4) on the input side and a detection point on the output side of the breaker gap (2), via detection resistances (R1) said voltage detection circuit (3) being connected to the detection points (4) at high-resistance but in a permanently galvanized manner.

Abstract: The three-phase power controller is provided which has interrupt-controlled phase-gating control with a simple, cost-effective design. The power controller uses of a single microcontroller with only one or two interrupt inputs. This is made possible by forming voltage zero signals, whose flanks are used for interrupt control. Interrupt routines in the executive program of the microcontroller control the times when trigger signals are emitted, exclusively on the basis of the voltage zeroes as information about the three-phase mains system.

Abstract: A method of smoothly stopping pump drives without pressure surges is provided. To accomplish this, the phase control angle between the motor current and the motor voltage is increased according to a linear ramp starting from 0.degree. with the help of an a.c. power controller, where the phase angle decreases and reaches a turning point. If the turning point is detected by observing the phase angle, the phase control is based on this by means of a controller with a predefined linear phase angle reference curve as a function of time. Then the motor rpm does not change abruptly because a rapid change in phase angle is prevented.