Siemens Aktiengesellschaft

Bernd Schwinn

Michael Gerstner

Henry Franke

Stefan Widmann

Wolfgang Erven

Michael Strassburger

Rainer Hauser

Christoph Boerzsoenyi

Anand Venkatramani

Martin Muellhofer

Alexander Fanderl

Thomas Moosburger

Juergen Reisinger

Matthias Strobl

The invention relates to a circuit breaker for a low-voltage circuit having input and output terminals for conductors of the low-voltage circuit. Within the circuit breaker, the low-voltage circuit can be interrupted or closed. The circuit breaker also has a current sensor which determines the level of the electrical current in the low-voltage circuit and is connected to an electronic trigger unit which has a display for displaying information and interrupts the low-voltage circuit if current limit values or current-time limit values are exceeded. The display is designed to be removable.

Circuit breaker, removable display, and electronic trip unit for a circuit breaker

Events relevant for the service life are recorded for calculating the remaining service life of a switch. Events relevant for the service life are evaluated with respect to the frequency of their occurrence. The possibility of a future occurrence for the service life of relevant events is taken into account or not taken into account in accordance with the frequency of their occurrence for calculating the remaining service life.

Remaining service life prediction for switches

A circuit breaker system has a circuit breaker with a circuit breaker communication unit. A display unit contains a display housing, and the circuit breaker and the display unit are configured such that the display unit is latched to the circuit breaker. The circuit breaker and the display unit, in the latched state, are connected to one another by a plug connection, such that data of the circuit breaker are displayable on the display unit. A display holder is provided, containing a holder housing and a holder communication unit. The display holder is configured such that the display unit can be latched into the display holder, that the display holder and the display unit, in the latched state, are connected to one another by an electrical plug connection, and that the display holder is configured such that the data of the circuit breaker are displayed in the latched state.

System, circuit breaker, display unit and display holder

A circuit breaker is disclosed for interrupting an electrical circuit when current limit values are exceeded. The circuit-breaker includes a current sensor for determining the electrical current flow and a control device. When current limit values are exceeded, the electrical circuit is interrupted. A first current limit value, when exceeded, results in an immediate interruption and a second current limit value, when exceeded, results in a time-delayed interruption, such that the second interruption time reduces as the current increases. Only one control element is included for setting a current limit value. The element defining the second current limit value is included for the time-delayed interruption of the electrical circuit. The other parameters are either set in a fixed manner and/or are related to the settable second current limit value.

Configurable circuit-breaker

A display unit and an installation are disclosed for distributing electrical energy. In an embodiment, a display unit includes a plurality of switches. The display unit is connected via a communication link to the switches and is configured to receive data relating to the operation of the switches. Each switch of the installation comprises two mechanically disconnectable switching elements, a sensor unit to detect the current flowing over the switching elements, an electronic trip unit to initiate the disconnection of the switching elements if a trip condition allocated to the switch is fulfilled, and a mechanical switching unit to disconnect the switching elements if the trip condition is fulfilled.

Display unit and installation for distributing electrical energy with a corresponding display unit

The method for the automatic adjustment of a protective device includes determining an integral of the square of a motor current over time on the basis of a time motor current profile of an asynchronous motor on a load, after switching on and reversing and deriving a tripping time of the overcurrent release on the basis of the determined integral, the integral, which corresponds to a heating of the asynchronous motor, being related to a multiple of the square of the rated current, and the motor current profile including at least the starting current, the transient and the selected motor rated current.

Growing community of inventors

Fuerth, Germany

Bernd Schwinn