Abstract: A method is disclosed for testing a latching solenoid of a switch and a testing device for carrying out the method is disclosed. The switch includes a switching contact, formed by contact elements mechanically separated from one another when the switching contact is open; an electronic trip unit, to respectively monitor the current passing via the contact elements and test whether a current-dependent tripping condition is satisfied; and an actuator, to separate contact elements after actuation, the trip unit actuating the actuator via the latching solenoid when the tripping condition is satisfied; and an electrical energy store, to charge to a voltage before the tripping and to be discharged via the latching solenoid. After a period of time after the tripping, the voltage of the energy store is compared with a reference value and a fault signal is output if the voltage of the energy store is above the reference.

Abstract: A method is disclosed for testing a latching magnet of a switch including a switching contact, formed from contact elements mechanically separated from one another for opening the switching contact; an electronic trip unit, to monitor current flowing via the contact elements and to perform a test for a current-dependent trip condition; an electrical energy store, forming a circuit with the winding of the latching magnet, the circuit being closed for a first closing time when the trip condition of the trip unit is met; and an actuator, actuable by closing off the circuit and configured to separate the contact elements. For test purposes, the circuit is closed for a second closing time, which is so short that separation of the contact elements by the actuator does not take place. A test is then performed to ascertain whether there is a current flowing via the winding of the latching magnet.

Abstract: A method and a test device are disclosed for testing a latching magnet of a switch. The switch includes a switching contact; an electronic trip unit to monitor the current flowing and to test whether a current-dependent trip condition is met; an electrical energy store, forming a circuit with the winding of the latching magnet, the circuit being closed by the trip unit when the trip condition is met; an actuator, actuated for a first closing time by closing of the circuit and configured to separate the contact elements; and a first diode, connected in parallel with the winding and via which stored energy of the latching magnet is dissipated. The test device is configured to close the circuit for a second closing time, which is so short that no actuation of the actuator takes place. After the reopening, a test is performed to ascertain whether stored energy is dissipating.

Abstract: A method is disclosed for detecting a defective amplifier. The device includes an electronic tripping unit which respectively carries out a check in order to determine whether the energy through the switch satisfies a condition and trips the switch if the condition has been satisfied; and an analog/digital converter respectively outputting the two differently amplified analog signals as digital values. In an embodiment of the method, a decision is made regarding which of the two digital values is used to check the condition. To detect defective amplifiers in the signal conditioning device of tripping units during ongoing operation, a check is carried out to determine whether at least one of the two digital values is in a predefined range; if so, whether the two digital values each belonging to the same time are in a predefined tolerance range. A fault is signaled if this is not the case.

Abstract: A method is disclosed for retrieving a data point (operating data) of a switch via a device which does not recognize the data point of the switch and which can only retrieve such data points of a switch. The device is connected to the switch via a data connection for retrieval. In an embodiment, the switch has a data set in which the data point is described including the use of said data point. The device retrieves the data set during the data connection and extracts at least the description and the use of the data point of the switch from the data set. The device retrieves said data point that is recognized by the device at least for the duration of the data connection and processes said data point using the extracted description and use.

Abstract: In an apparatus having a rotary switch which can be moved into a plurality of positions, each of which is assigned a different function of the apparatus, a different input signal is respectively supplied to a microcontroller when each position is assumed. In at least one embodiment, a firmware program accesses a table as external data source, the table directly assigning input signals and output values to one another, that is to say assigning the input signals to a switch position and assigning the switch position to an output value in one go.

Abstract: The present invention relates to a pharmaceutical composition in the form of a storage-stable solution for the parenteral administration of ultrashort-effective ?-adrenoreceptor antagonists, comprising a) an ultrashort-effective ?-adrenoreceptor antagonist and/or a pharmaceutically acceptable salt thereof, b) water, and c) a cyclodextrin and/or a functional cyclodextrin derivative. The composition according to the invention has high stability, even without the presence of additional adjuvants.