Abstract: A current measurement apparatus for measurement value acquisition includes: a current sensor; and a current measurement transducer. A measurement range of the current sensor is adjustable. The current sensor includes at least one magnetic field sensor having at least one matching circuit and a memory. The current measurement transducer includes an input interface for inputting and/or a communication interface for transmitting information with respect to measurement range switching. The current measurement transducer includes an output interface for outputting the measurement values. The measurement range switching for the current sensor is based on the matching circuit accessing at least one new matching value in the memory, by which a change of the measurement signal of the magnetic field sensor is adjustable.

Abstract: The present disclosure relates to a DC generator that has at least one string, wherein the at least one string is formed by modules which are series-connected by a string line so as to generate a string voltage; and a switching device which is connected in series in the string line, in order to switch on and off the at least one string using the switching device. The switching device comprises a hybrid switch including a relay and a semiconductor switching device connected in parallel to the relay, wherein the semiconductor switching device includes at least one semiconductor switch. The switching device comprises a current sensor which is adapted to measure a negative current flow.

Abstract: The present disclosure relates to a photovoltaic system comprising a switching device for switching on and off at least one photovoltaic string, to an electronically controlled direct current hybrid switching device for switching on and off at least one photovoltaic string, in a user-controlled manner, to the use of a hybrid switch for switching a photovoltaic string, and to a method for switching off and back on at least one photovoltaic string of the photovoltaic system.

Abstract: The present disclosure relates to a photovoltaic system comprising a switching device for switching on and off at least one photovoltaic string, to an electronically controlled direct current hybrid switching device for switching on and off at least one photovoltaic string, in a user-controlled manner, to the use of a hybrid switch for switching a photovoltaic string, and to a method for switching off and back on at least one photovoltaic string of the photovoltaic system.

Abstract: A photovoltaic system includes at least one string of solar modules and a system for individually disconnecting the solar modules and for safely connecting or reconnecting the disconnected solar modules to the string. At least some of the solar junction boxes are “smart” and have a safety circuit that defines an operating state and a safe state. The solar junction boxes are switched from the safe state to the operating state, i.e. are activated, by injecting a starting current.

Abstract: The present disclosure relates to a photovoltaic system comprising at least one string of series-connected solar modules and an inverter, a test circuit which can be connected between the string and the inverter in at least one string line, and a testing method in particular for checking whether the inverter-side section of the string lines is closed and whether the inverter is connected.

Abstract: The present disclosure relates to a photovoltaic system comprising at least one string of series-connected solar modules and an inverter, a test circuit which can be connected between the string and the inverter in at least one string line, and a testing method in particular for checking whether the inverter-side section of the string lines is closed and whether the inverter is connected.

Abstract: A fault detection system in a photovoltaic system 1, is able to identify a system state on the basis of a first and optionally a second measured data profile and is thus able to distinguish error states from the operating state of the system.

Abstract: The invention provides a fault detection system in a photovoltaic system 1, which is able to identify a system state on the basis of a first and optionally a second measured data profile and is thus able to distinguish error states from the operating state of the system.

Abstract: The invention relates to a photovoltaic system comprising at least one string of solar modules and a system for individually disconnecting the solar modules and for safely connecting or reconnecting the disconnected solar modules to the string. At least some of the solar junction boxes are “smart” and have a safety circuit that defines an operating state and a safe state. The solar junction boxes are switched from the safe state to the operating state, i.e. are activated, by injecting a starting current.

Abstract: A monitoring device for an ungrounded electric network of a photovoltaic system. The monitoring device includes a short circuit measuring circuit having a first electric measuring circuit conductor connecting a first electric pole of the photovoltaic system with a reference point by means of at least one protective component, and second electric measuring circuit conductor for connecting a second electric pole of the photovoltaic system with ground be means of at least one protective component. A first component is connected between one of the measuring circuit conductors and ground, and a measuring device for measuring an electric parameter of the first component, wherein a non-zero value of the parameter and/or a change of the value of the parameter indicate an electric fault between the photovoltaic system and ground.

Abstract: A monitoring device for an ungrounded electric network of a photovoltaic system. The monitoring device includes a short circuit measuring circuit having a first electric measuring circuit conductor connecting a first electric pole of the photovoltaic system with a reference point by means of at least one protective component, and second electric measuring circuit conductor for connecting a second electric pole of the photovoltaic system with ground be means of at least one protective component. A first component is connected between one of the measuring circuit conductors and ground, and a measuring device for measuring an electric parameter of the first component, wherein a non-zero value of the parameter and/or a change of the value of the parameter indicate an electric fault between the photovoltaic system and ground.