Abstract:
A static transfer switch assembly includes a first digital signal processor circuit associated with a preferred power source to detect a power quality event at the preferred power source, and a second digital signal processor circuit associated with an alternate power source to detect a power quality event at the alternate power source. A third digital signal processor circuit is in communication with each of the first and second digital signal processors and with a transfer switch. The third digital signal processor circuit computes and balances flux in real time based on sample voltages received from each of the preferred and alternate power sources, and controls the transfer switch to transfer the load from one of the power sources to the other power source, based on one of the first or second digital signal processor circuits detecting a power quality event.
Abstract:
An electrical power distribution system and apparatus is provided that that is comprised of multi-source connections, multi-load connections and bi-directional connections, where the system is configured to be multi-functional, hot swappable, changeable, expandable, configurable and controllable.
Abstract:
A load control system having a controllable electrical outlet provides a low cost solution for controlling a plurality of standard electrical outlets. The controllable electrical outlet may be coupled in series between a power source and at least one standard electrical outlet for controlling the power delivered to the standard electrical outlet. The controllable electrical outlet may comprise an actuator for allowing the controllable electrical outlet to be associated with an input device for receiving digital messages from the input device. The controllable electrical outlet may be installed in a standard electrical wallbox, e.g ., replacing a previously-installed standard electrical outlet. The actuator may be easily accessed to associate the controllable electrical outlet with the input device and a radio-frequency receiver and antenna may be located in the controllable electrical outlet to provide optimum reception of radio-frequency signals.
Abstract:
A multiple uninterruptible power supply system includes at least two uninterruptible power supply modules. Each uninterruptible power supply module has a control unit with the control unit coupled to a synchronization bus. The uninterruptible power supply module are synchronized to each other with one of the uninterruptible power supply modules being operated as a sync master UPS and its control unit sending synchronization signals on the synchronization bus that are received on the synchronization bus by control units of each of the other uninterruptible power supply module which are each operated as a slave UPS synchronized to the sync master UPS. When a bypass power source for the uninterruptible power supply module that is being operated as the sync master becomes unqualified, another one of the UPS modules is operated as the sync master and its control unit then sends out the synchronization signals.
Abstract:
The invention relates to a method for controlling the supply of electric power to an electric mining unit intended for the processing of rock material, in which method, by means of a three-phase electric power network (2) provided in the mining unit and a mains switch (2') for connecting the mining unit to or for disconnecting it from an external electric power network (2"), and a power source (7), as well as at least one inverter (8, 8') and at least one transformer (14) and switches (3, 4, 5, 16, 17), the supply of electric power to the mining unit is controlled in such a way that when the electric power network (2) of the mining unit is connected to the external electric power network (2"), the first electric motor (9) and the second electric motor (13) are supplied from the external electric power network (2") or from the power source, and the power source (7) is simultaneously charged for at least part of the time from the external electric power network (2") by means of the inverter and the transformer or a charging system (15), and that when the second electric motor (13) is supplied from the external electric power network (2"), the first electric motor (9) is simultaneously supplied, if necessary, solely from the power source (7) provided in the mining unit, by means of the inverter (8). The invention also relates to an arrangement and a mining unit.
Abstract:
Die Erfindung betrifft ein elektrisches Gerät (13, 13a, 13b) zum Ansteuern eines mit einem Energieversorgungsnetz (10) in Verbindung stehenden Energieerzeugers (12), mit einer Steuereinrichtung (21, 30), über die der Energieerzeuger (12) hinsichtlich seines Betriebszustands ansteuerbar ist. Um ein solches elektrisches Gerät (13, 13a, 13b) derart weiterzubilden, dass eine vergleichsweise einfache Ansteuerung eines Energieerzeugers (12) möglich ist, wird vorgeschlagen, dass es im Bereich der Verbindungsstelle zwischen dem Energieversorgungsnetz (10) und dem Energieerzeuger (12) angeordnet ist, dass die Steuereinrichtung (21, 30) dazu eingerichtet ist, die Spannung und/oder Frequenz zu überwachen und ein Einschaltsignal zu erzeugen, wenn die überwachte Spannung und/oder Frequenz einen unteren Schwellenwert unterschreitet, und ein Ausschaltsignal zu erzeugen, wenn die überwachte Spannung und/oder Frequenz einen oberen Schwellenwert überschreitet; bei vorliegendem Einschaltsignal wird der Energieerzeuger (12) eingeschaltet oder die von dem Energieerzeuger (12) abgegebene elektrische Leistung erhöht und bei vorliegendem Ausschaltsignal wird der Energieerzeuger (12) abgeschaltet oder die von dem Energieerzeuger (12) abgegebene elektrische Leistung verringert. Die Erfindung betrifft ferner ein Verfahren zum Ansteuern eines elektrischen Energieerzeugers (12).