Siemens Aktiengesellschaft

Alfred Ransmayer & Albert Rodrian

Gerhard Tietz

Hans Rehaag

Andreas Pancke

Holger Hochgraef

Aron-Ernst Musiol

Jeffery C Mizener

Manfred Schiller

Gerd Mueller

Michael-Alexander Jankowiak

Aaron-Ernst Musiol

Michael Jankowiak

An electronic trip unit is for a low-voltage circuit breaker of a three-phase AC circuit. The electronic trip unit includes a housing with a front, rear, left-hand, right-hand, top and bottom face; a controller to compare current measurement values of the three-phase AC circuit with at least one of current limit values, current period limit values and time period limit values and to output a tripping signal, for interrupting the three-phase AC circuit, upon the values being exceeded. The electronic trip unit further includes a receptacle to provide a connection between the electronic trip unit and the module, the module being receivable by the left-hand, right-hand, top or bottom side face of the housing. At least one function of the electronic trip unit is activated upon the module being received. The front face of the housing includes a viewing window. At least a portion of a received module is visible.

Electronic trip unit for a low-voltage circuit breaker including a receptacle for a module, and a module for connection to the electronic trip unit

Data memories are used to represent the characteristic values of the properties of the circuit-breaker and the associated current transformer. A cable harness uses a writeable electronic memory module which is inserted into one of the interconnecting cables between the current transformer(s) and the overcurrent trip as the data memory.

Low-voltage circuit breaker comprising a data memory

An electrical power circuit breaker includes an electric overcurrent trip unit for processing a signal from a current sensor. A flexible connecting line is provided for connecting the current sensor to the overcurrent trip unit and a first component of a two-part plug apparatus is fitted to its end. The second component of this plug apparatus is part of the overcurrent trip unit. At least one resistor is arranged between contact pins in the first component, in order to code individual characteristic values or combinations of such characteristic values, such as the rated current or switching rating class.

Electric circuit breaker having a data store

A type disk for a typewriter, having a hub which can be plugged over a drive shaft of the typewriter and a catch, which can be moved to or fro relative to the hub, and is carried by an outrigger connected integrally to the hub and capable of being deflected in the axial direction of the hub and can be engaged in a recess of a collar of a drive shaft for rotational position fixing of the type disk. A cut-out which is arranged in the surface portion of the type disk for the hub extends in the configuration of a circular arc in the hub plane substantially in a semi-circular arc, and the outrigger is configured as a circular arc-shaped bow, the course of which is congruent with that of the cut-out in the region of the cut-out, and can be accommodated in the cut-out, the catch being arranged in a peak region of the bow.

Type disk

Growing community of inventors

Berlin, Germany

Gerhard Tietz