Siemens Aktiengesellschaft

Siemens Aktiengesekkschaft

Andreas Pancke

Andreas Krauss

Thomas Driehorn

Ilka Redmann

Hans Rehaag

Aron-Ernst Musiol

Wolfgang Röhl

Holger Hochgraef

Gerhard Tietz

Wolfgang Roehl

Manfred Schiller

Jeffery C Mizener

Bernd Ette

Michael Jankowiak

Klaus Neidhardt

Peter Schust

A method is disclosed for storing individual data items of a low-voltage switch provided with a microcontroller triggering unit. According to an embodiment, the ROM cells of a dead microcontroller ROM which are not occupied by a program code memory cells are occupied by the individual data items of the low-voltage switch.

Method for storing individual data items of a low-voltage switch

A method is disclosed for controlling an electronic overcurrent trip for low-voltage circuit breakers. According to the method, digitized signals for the electricity values are generated and evaluated, and a tripping device providing short-circuit protection is activated when an overcurrent event is assumed to take place based on the evaluation. According to the method, signals whose electricity value does not lie between the electricity values of the previous signal and the subsequent signal, or whose electricity value does not correspond to the electricity values of the previous signal or the subsequent signal, are rated as potentially erroneous signals and are tested by use of additional criteria.

Method for controlling an electronic overcurrent trip for low-voltage circuit breakers

A three or four pole low-voltage power switch is disclosed wherein the switch is partly provided with a device for detecting ground faults. For this purpose, the current vectorial sum must be produced in the three or four conductors of a monitored network. For the switches of this type, output signals received from Rogowski coils are directed via resistances to an integration capacitor whose voltage forms an input signal of another measuring amplifier representing the current sum of a monitored network. The output signal of the measuring amplifier is, afterwards processed in a known manner in the microprocessor of an excess-current trip.

Three- or four-pole low-voltage power switch with Rogowski coils operating as current sensors

An electrical power breaker includes an electronic protective device and an electronic memory. The memory is accommodated in the power breaker such that it is physically separated from said protective device, for operational data for the power breaker. Data security when using the additional electronic memory is increased by the electronic memory being connected to the protective device via a data bus, which can be used to transmit control signals for the purpose of activating or deactivating a write protection device of the electronic memory. The data bus is preferably an IC bus, and the write protection device is controlled by an I/O module which is likewise controlled by the IC bus.

Electric power switch with an electronic memory unit for parameters and conversion factors

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

In order to provide as short a switching delay as possible in an undervoltage release which contains an electromagnet for tripping a switching device, and a driver circuit feeding the winding of the electromagnet, with the driver circuit being used to produce a pulsed holding current for the electromagnet, an electronic switch is fitted in the self-holding circuit that is produced via a freewheeling diode. This electronic switch can be driven as a function of the output signal from an undervoltage detector which is arranged within the driver circuit.

Under voltage release with an electromagnet and clocked holding current circuit

Circuit breaker having an electronic tripping unit and parameterization locking

Growing community of inventors

Berlin, Germany

Andreas Pancke