Abstract: An electric device for controlling an energy generator connected to an energy supply grid includes a control device that controls the generator with respect to the energy generator operating state. The electric device, which is connected between the energy supply grid and the generator, enables comparably simple control of the generator. The control device monitors the voltage and/or frequency and generates a switch-on signal if the voltage and/or frequency falls below a lower threshold and generates a switch-off signal if the monitored voltage and/or frequency exceeds an upper threshold. If a switch-on signal is present, the energy generator is switched on or the electric power output is increased. If a switch-off signal is present, the energy generator is switched off or the electric power output is decreased. A related method provides for controlling an electric energy generator.

Abstract: An electrical device for connecting to an electrical distribution network of a building. The electrical distribution network is connected to an electrical energy supply network. The electrical device has a switching device for switching on and off an electrical load. For the purpose of relatively simple demand control of the electrical load, the electrical device has a monitoring device for monitoring the voltage and/or frequency at the electrical device on the distribution network side and to generate a switch-on signal if the monitored voltage and/or frequency exceeds an upper threshold value and to generate a switch-off signal if the monitored voltage and/or frequency falls below a lower threshold value. The switching device establishes a current flow between the distribution network and the electrical load when a switch-on signal is present and interrupts a current flow between the distribution network and the electrical load if a switch-off signal is present.