Abstract: A measurement sensor for analyzing a nonpolar liquid contains a field effect transistor that has an exposed gate contact for wetting with the nonpolar liquid, and an electrical shield that surrounds the gate contact and has openings for inflow and outflow of the nonpolar liquid.

Abstract: A semiconductor module has at least one die, made of silicon carbide, in which semiconductor components are patterned. The die includes at least one exposed surface for contacting an external heat sink.

Abstract: The invention relates to an arrangement for operating a geophysical locating device by means of evaluating magnetic field changes, comprising flux gate sensors, an amplifying circuit as well as an evaluating and display unit. According to the invention, two interspaced flux gate sensors oriented in the same direction are provided in a probe, wherein the sensors furnish output voltages which are identical with regard to polarity. The output signals are fed each to a level alignment circuit as well as to a low-pass filter. There is a connection to an input of a differential amplifier at the respective outputs of the low-pass circuits which is connected to the input of a limiting amplifier. The evaluation signal can be tapped at the output of the limiting amplifier for further processing.

Abstract: A method and a circuit are disclosed for amplifying the input signals of an electronic overcurrent release of low-voltage circuit breakers with a selectable amplification factor. The electronic overcurrent release includes at least one integrating condenser on the input side, and at least one pre-amplifier and a microprocessor. According to at least one embodiment of the invention, a resistance is coupled to a switch in series, parallel to an integrating condenser, and the switch is switched by way of the microprocessor in a pulsewidth-modulated manner. In this way, the effectively active resistance value of the inserted resistances is inversely increased proportionally to the pulsewidth repetition rate, thus obtaining an extremely wide regulating range.

Abstract: A three or four pole low-voltage power switch is disclosed wherein the switch is partly provided with a device for detecting ground faults. For this purpose, the current vectorial sum must be produced in the three or four conductors of a monitored network. For the switches of this type, output signals received from Rogowski coils are directed via resistances to an integration capacitor whose voltage forms an input signal of another measuring amplifier representing the current sum of a monitored network. The output signal of the measuring amplifier is, afterwards processed in a known manner in the microprocessor of an excess-current trip.

Abstract: A three or four pole low-voltage power switch is disclosed wherein the switch is partly provided with a device for detecting ground faults. For this purpose, the current vectorial sum must be produced in the three or four conductors of a monitored network. For the switches of this type, output signals received from Rogowski coils are directed via resistances to an integration capacitor whose voltage forms an input signal of another measuring amplifier representing the current sum of a monitored network. The output signal of the measuring amplifier is, afterwards processed in a known manner in the microprocessor of an excess-current trip.

Abstract: A method is disclosed for controlling an electronic overcurrent trip for low-voltage circuit breakers. According to the method, digitized signals for the electricity values are generated and evaluated, and a tripping device providing short-circuit protection is activated when an overcurrent event is assumed to take place based on the evaluation. According to the method, signals whose electricity value does not lie between the electricity values of the previous signal and the subsequent signal, or whose electricity value does not correspond to the electricity values of the previous signal or the subsequent signal, are rated as potentially erroneous signals and are tested by use of additional criteria.

Abstract: An electrical power breaker includes an electronic protective device and an electronic memory. The memory is accommodated in the power breaker such that it is physically separated from said protective device, for operational data for the power breaker. Data security when using the additional electronic memory is increased by the electronic memory being connected to the protective device via a data bus, which can be used to transmit control signals for the purpose of activating or deactivating a write protection device of the electronic memory. The data bus is preferably an I2C bus, and the write protection device is controlled by an I/O module which is likewise controlled by the I2C bus.

Abstract: An electrical power breaker includes an electronic protective device and an electronic memory. The memory is accommodated in the power breaker such that it is physically separated from said protective device, for operational data for the power breaker. Data security when using the additional electronic memory is increased by the electronic memory being connected to the protective device via a data bus, which can be used to transmit control signals for the purpose of activating or deactivating a write protection device of the electronic memory. The data bus is preferably an I2C bus, and the write protection device is controlled by an I/O module which is likewise controlled by the I2C bus.

Abstract: A tire inflating system has the tire inflating source connected through the hub to the wheel by a pair of aligned axial holes in the hub and wheel. A movable tube piece in the axial hole in the wheel is formed with side openings and is engaged by a sealing ring in the axial hole in the wheel which also receives a seal pressed by a spring toward a mouth of that hole. The tube piece can hold the seal in an open position until the wheel is separated from the hub.

Abstract: The invention relates to a circuit breaker with comprising flow sensors for determine measuring flowing through switching, and an electronic overcurrent release device for processing signals pertaining to the flow sensors. An information memory embodied as a Memory Button transfers characteristic values pertaining to the circuit breaker and/or flow sensors to the overcurrent release device. Various additional functions, e.g. registration of unusual procedures including date permissible number of make-break operations are also possible.