Siemens Aktiengesellschaft

Yi Zhu

Shivansh Batra

Thomas Beckert

Bernhard Rösch

Feng Du

Michael Hein

David Meulenbroeks

Wei Chen

Yue Zhuo

Zhen Yu Liu

Martin Maier

Uwe Weiss

Andreas Krätzschmar

A redundant power supply is provided having a first power supply, which is connectable to a busbar by a first tie switch and is disconnectably connected to a first load by a first line system, and having a second power supply, which is connectable to the busbar by a second tie switch and is disconnectably connected to the first load by a second line system, and having a third power supply, which is connectable to the busbar by a third tie switch and is disconnectably connected to a second load by a third line system, and having a fourth power supply, which is connectable to the busbar by a fourth tie switch and is disconnectably connected to the second load by a fourth line system. All of the tie switches are open during trouble-free operation.

Redundant power supply, in particular for data centers, and method and computer program for the operation thereof

An electrical network is equipped with feed-in devices, loads, a distribution grid arranged therebetween, at least one semiconductor switch, and at least one electromechanical switch for separating a feed-in device or a load in the event of a fault. The feed-in devices and loads are arranged in groups which are connected together by a busbar and paired semiconductor switches. Each feed-in device and load can be separated from the grid by an electromechanical switch in the event of a fault, and the individual groups of feed-in devices and loads can be separated from one another by the semiconductor switches in the event of a fault in order to prevent cross currents on the busbar.

Electrical network

In a method for coordinating a distribution grid of different levels of electromechanical switches and automatically electrically closable apparatuses in a DC circuit, the distribution grid is arranged between feed-in devices and loads and includes at least one busbar. Each of the apparatuses includes an electrical switch to open or close the DC circuit, a fault current detection device, a tripping unit, and a pre-charging apparatus.

Method for coordinating protective devices in a distribution grid

An electrical network includes feed-in devices, loads, and a distribution grid, which is arranged therebetween and comprises at least one busbar and at least one device for opening or closing a DC circuit. The at least one device includes: an electric switch for opening or closing the DC circuit; a fault current detection device; a trigger unit; a precharging device; and a control unit for automatically closing the electric switch after the precharging process. The electric switch opens the DC circuit via the trigger unit if a fault current is detected by the fault current detector, and the precharging device restores the voltage on the busbar prior to closing the electric switch. Multiple loads can be individually electrically separated via a respective electromechanical switch, and multiple loads can be electrically separated as a group via the at least one device.

Electrical network having fault protection control

A device is for opening or closing a DC circuit with at least one busbar. The device includes an electric switch for opening or closing the DC circuit; a fault current detector; a trigger unit and a precharging device. The electric switch opens the DC circuit via the trigger unit upon a fault current being detected by the fault current detector. Further, the precharging device restores the voltage on the busbar prior to closing the electric switch. The device further includes a control unit for automatically closing the electric switch after the pre-charging process.

Apparatus for opening or closing a DC circuit, and method for automatically closing a DC circuit

A redundant power supply has a first power supply, which is disconnectedly connected to a busbar by means of a first tie switch and is connectable to a first load without a tie switch, and having a second power supply, which is disconnectedly connected to the busbar by means of a second tie switch and is connectable to the first load without a tie switch, and having a third power supply, which is disconnectedly connected to the busbar by means of a third tie switch and is connectable to a second load without a tie switch, and having a fourth power supply, which is disconnectedly connected to the busbar by means of a fourth tie switch and is connectable to the second load without a tie switch. All of the tie switches are closed during trouble-free operation.

An electric grid includes feed-ins, loads, and a distribution grid, which is arranged therebetween. The distribution grid comprises at least one busbar and at least one device for opening or closing a DC circuit. The at least one device includes an electric switch for opening or closing the DC circuit, a fault current detector, a trigger unit, a precharging device, and a control unit for automatically closing the electric switch after the precharging process. The electric switch opens the DC circuit via the trigger unit if a fault current is detected by the fault current detector, and the precharging device restores the voltage on the busbar prior to closing the electric switch.

Electric grid and method for operating an electric grid

Provided is a nano grid protection device for a nano grid including a distributed power supply, a large power grid including the nano grid protection device, and a method for controlling the nano grid protection device. In an embodiment, the nano grid is connected with a bus through the nano grid protection device and a main grid is connected with the bus through a main grid protection device. In an embodiment, the nano grid protection device includes: a signal unit, configured to detect and send current information passing through the nano grid protection device, the current information including the magnitude and direction of the current; a controller, configured to determine, based upon the received current information, whether to send a trip signal or not; and an execution mechanism, configured to execute a trip operation of the nano grid protection device upon receiving the trip signal.

Nano grid protection device, large power grid and a method for controlling a nano grid protection device

A short-circuit release is disclosed, in particular for a power circuit-breaker, including an armature and a pole, that are located inside of a coil element; and a yoke plate and a terminal connection, which are arranged around the coil element. In at least one embodiment, a coil is wound on the coil element, the two ends of which are weldable on corresponding coil terminals from the same side.

Short-circuit release having an optimized coil connection

A short-circuit release is disclosed, in particular for a power circuit-breaker. In at least one embodiment, the short circuit release includes an armature and pole that are located inside a coil former and further includes a yoke plate and terminal connection that are positioned around the coil former. Arranged opposite the yoke plate is a magnetic plate resting against the terminal connection.

Growing community of inventors

Darmstadt, Germany

Yi Zhu