Abstract: The invention relates to uninterruptible power supply devices which make it possible to supply emergency power to a load, which is to be supplied, in the event of mains failure. The invention is based on the object of providing a device for supplying uninterruptible power, which device can be operated in a more energy-saving manner and in which the emergency power can be controlled in a rapid and safe manner. To this end, the uninterruptible power supply device has a power transistor which can be rapidly switched and can be used to connect a standby power source to the output connections during emergency power operation. The output current can also be dynamically limited by driving the power transistor, which can be rapidly switched, in a corresponding manner. In addition, the input and output of the UPS device are decoupled using a field effect transistor that acts as a power transistor.

Abstract: The invention relates to an electronic power supply device, particularly a switched-mode power supply, for supplying power to a low-voltage load protected by a protective device, and to a method therefor. The invention also relates to a device for protecting a low-voltage load against an excess current and to an auxiliary power supply device for use with such a protection device. The conceptual core of the invention can be seen in providing measures which ensure that after a fault has been detected, for example a short circuit at the output, a current is supplied for a short period, for example 15 ms, which is of such a magnitude that a protective device can be reliably and quickly tripped. The period for this is selected in such a manner that electronic components, connected loads and feedlines are not damaged and destroyed.

Abstract: A mounting plate includes a first fixing device for an electrical device and a second fixing device for a top-hat shaped mounting rail having a first offset support flange and a second offset support flange. The second fixing device includes a first holder and a second holder each having a contact portion and each being disposed mirror-symmetrically about a longitudinal axis of the mounting plate on a rear surface of the mounting plate. The second fixing device further includes an abutment opposite the first and second holders, and a metal projection configured to clamp at least one of the first and second offset support flanges against the contact portions of the first and second holders. The projection is configured to deform upon clamping of the at least one of the offset support flanges.

Abstract: The invention relates to uninterruptible power supply devices which make it possible to supply emergency power to a load, which is to be supplied, in the event of mains failure. The invention is based on the object of providing a device for supplying uninterruptible power, which device can be operated in a more energy-saving manner and in which the emergency power can be controlled in a rapid and safe manner. To this end, the uninterruptible power supply device (10) has a power transistor (42) which can be rapidly switched and can be used to connect a standby power source (60) to the output connections (100, 101) during emergency power operation. The output current can also be dynamically limited by driving the power transistor, which can be rapidly switched, in a corresponding manner. In addition, the input and output of the UPS device (10) are decoupled using a field effect transistor (22) that acts as a power transistor.

Abstract: The invention relates to an electronic power supply device, particularly a switched-mode power supply, for supplying power to a low-voltage load protected by a protective device, and to a method therefor. The invention also relates to a device for protecting a low-voltage load against an excess current and to an auxiliary power supply device for use with such a protection device. The conceptual core of the invention can be seen in providing measures which ensure that after a fault has been detected, for example a short circuit at the output, a current is supplied for a short period, for example 15 ms, which is of such a magnitude that a protective device can be reliably and quickly tripped. The period for this is selected in such a manner that electronic components, connected loads and feedlines are not damaged and destroyed.

Abstract: The invention proposes a method and a measuring system for testing the function of LCD displays comprising individual display segments, based on the difference in the electrical capacitance Cseg of defective and intact display segments. The method is based on the direct determination of the capacitance of the display segments with a capacitance measuring method by measuring the stored electrical charge. As a preferred measuring method, a method is proposed, in which a charge transfer through a reference capacitor Cref proceeds and the segment capacitance Cseg is determined by means of a charge balance, preferably by means of a ?? conversion.